circuit breaker - gas - fluor-bwxt portsmouthfbportsmouth.com/docs/stakeholder-docs/x-533 equipment...
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1
CIRCUIT BREAKER - GAS
Capabilities: In a large substation, circuit breakers are used to interrupt any short-circuits or overload currents that may occur on the network. A 345 kv, high voltage, three position/phase gas circuit breaker.
Description:. Circuit Breaker Gas – A 345 KV Three Position
Serial Numbers: N/A, N/A, 214, 215, 213, 207, 216, 212, 204, 205, N/A, N/A, 201, 0283A7944-201, 0283A7944-202
In Service: 5/31/1983 thru 8/31/1988
Life Cycle: 40 yrs.
Quantity: 15 units
Size: Unknown
Weight: 51,000 lbs
Original Cost: 13 were $281,830.05 and 2 were $349,818.70
Condition: They appear to be in fair condition. Should be inspected for functionality.
Location: X-533A Switch Yard
2
TRANSFORMER POWER – McGraw-Edison
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 330/13.8 KV 100,000
Serial Numbers: 26201-2, 26201-1
In Service: 1 in 2/28/1955. 1 in 1/31/1975.
Life Cycle: 40 yrs.
Quantity: 2 units
Size: Untanking Height 22’5”
Weight: Serial #26201-2 #26201-1To be lifted untanking: 244900 253500 lbsTank and Fittings: 99600 89100 lbsType 442 LTC Mechanism: 1600 1600 lbs
Oil 15865 Main & Selector Comp:119000 Oil 15825 118700 lbsOil 700 Contactor Compartment: 5200 Oil 700 5200 lbsTotal: 470,000 468,100 lbs
Original Cost: $758,897.97 and $658,305.55
Condition: All but one transformer exceeds life cycle.
Location: X-533A Switch Yard.
3
TRANSFORMER POWER – Large Westinghouse
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 330/13.8 KV 100 000
Serial Numbers: 6530371, 5069361, 6530372, 5069360
In Service: 2/28/1955. There are tags to indicate an upgrade in 1976.
Life Cycle: 40 yrs.
Quantity: 4 units.
Size: Unknown
Weight: Core and coils 275,000 lbsCase 128,000 lbsOil 195,000 lbsTotal 598,000 lbs
Original Cost: $807,358.00
Condition: All transformers do not exceed life cycle.
Location: X-533A Switch Yard
.
4
TRANSFORMER POWER - Westinghouse
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 330/14.4 KV 125 MVA
Serial Numbers: 7002476, 7002477, 7002449, 7002358, 7002363, 7002418, 7002419
In Service: 6/30/1979
Life Cycle: 40 yrs.
Quantity: 7 units.
Size: Unknown
Weight: Core and coils 202,000 lbsCase 50,000 lbsOil 75,200 lbsTotal 327,200 lbsShipping 232,970 lbs
Original Cost: Varied from $701,226.01 to $730,102.20
Condition: All transformers do not exceed life cycle.
Location: X-533A Switch Yard.
5
TRANSFORMER POWER - GE
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 330/13.8 KV 100,000
Serial Numbers: C155609, C155607
In Service: 2/28/1958
Life Cycle: 40 yrs.
Quantity: 2 units
Size: Unknown
Weight: When untanking 146,500 lbsTank & Fitting 108,500 lbsMain tank No. 10-C 7810 132,700 lbsTop selector No. 10-C 790 5,900 lbsContactor No. 10-C 520 3,900 lbsTotal 397,500 lbs
Original Cost: $757,197.36 and $706,142.57
Condition: According to identified markings all transformers exceed life cycle.
Location: X-533A Switch Yard.
6
TRANSFORMER POWER – Allis-Chalmer
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 330/13.8 KV 100,000
Serial Numbers: 1-0140-24891-2, 1-0140-24891-5
In Service: The one located in the switchyard 12/31/1954.
Life Cycle: 40 yrs.
Quantity: 2 units.
Size: Height 460 inches
Weight: Core and coil 296,700 lbsOil 20888 157,000 lbsTank & Fitting 105,300 lbsTotal 559,000 lbs
Original Cost: $963,480.01 for one in Switch Yard.
Condition: According to identified markings all transformers exceed life cycle.
Location: One transformer is in X-533A Switch Yard and one transformer is on a concrete pad behind the X-533A Switch Yard.
7
TRANSFORMER POWER – BBC
Capabilities: It is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power HV 13.8 KV/LV 2.4 KV
Serial Number: SB77582-0101
In Service: Unknown
Life Cycle: Unknown
Quantity: 1 unit.
Size: Unknown
Weight: Core and coils 2,934 lbsOil 20888 1,582 lbsTank & Fitting 1,087 lbsTotal 5,603 lbs
Original Cost: Unknown
Condition: Unknown
Location: It is setting disconnected on a concrete pad behind X-533A Switch Yard.
8
TRANSFORMER POWER – PowerZone
Capabilities: It is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power KVA 1500/1932 13800 Volts
Serial Number: 820749-2
In Service: Unknown.
Life Cycle: Unknown.
Quantity: 1 unit.
Size: Untanking height of 150 inches.
Weight: Core and coil 4,055 lbsOil 20888 4,342 lbsTank & Fitting 3,743 lbsTotal 12,140 lbs
Original Cost: Unknown.
Condition: Unknown.
Location: It is setting disconnected on a concrete pad behind X-533A Switch Yard.
9
TRANSFORMER POWER – Fayetteville
Capabilities: It is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power KVA 6000 OA / 7500 FA 13800 Delta Volts
Serial Number: 95156-01
In Service: Unknown.
Life Cycle: Unknown.
Quantity: 1 unit.
Size: Untanking height of 150 inches.
Weight: Core and coil 14,000 lbsTank & Fitting 9,595 lbsOil 960 gallons 7,105 lbsTotal 30,700 lbs
Original Cost: Unknown.
Condition: Unknown.
Location: It is setting disconnected on a concrete pad behind X-533A Switch Yard.
10
TRANSFORMER POWER – GE
Capabilities: It is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power KVA 6000 OA / 7500 FA 13800 Delta Volts
Serial Number: B686511
In Service: Unknown.
Life Cycle: Unknown.
Quantity: 1 unit.
Size: Unknown
Weight: Untanking 191,000 lbsTank & Fitting 108,500 lbsOil 1700 gallons Main 127,000 lbsOil 790 Gallons 5,900 lbsOil 520 gallons Contactor 3,900 lbsTotal 436,500 lbs
Original Cost: Unknown.
Condition: Unknown.
Location: It is setting disconnected on a concrete pad behind X-533A Switch Yard.
11
TRANSFORMER POWER – Square D Company
Capabilities: It is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power
Serial Number: 796006843
In Service: Unknown.
Life Cycle: Unknown.
Quantity: 1 unit.
Size: Unknown.
Weight: Core and coil 2,540 lbsTank & Fitting 2,765 lbsOil 280 gallons 2,100 lbsUntanking 2,540 lbsTotal 7,405 lbs
Original Cost: Unknown.
Condition: Unknown.
Location: It is setting disconnected on a concrete pad behind X-533A Switch Yard.
12
TRANSFORMER GROUNDING – GE Zig Zag
Capabilities: Grounding transformers are used in utility distribution networks and in some power electronic converters in order to provide a neutral point in a three-wire system.
Description: Transformer Grounding Zig Zag GE OA-JT.
Serial Numbers: H-885175A, H-885175B
In Service: 6/30/1979
Life Cycle: 40 yrs.
Quantity: 2 units.
Size: Unknown
Weight: Untanking 3,800 lbsTank & Fitting 1,850 lbs10C Oil 425 Gallon 3,150 lbsTotal 8,800 lbs
Original Cost: $24,520.79
Condition: They appears to be in fair condition with over 9 years of life cycle remaining.
Location: X-533A Switch Yard.
13
TRANSFORMER GROUNDING – GE
Capabilities: A grounding transformer is used to provide a ground path to either an ungrounded "Y" or a delta connected system.
Description: Transformer Grounding Zig Zag GE OA-J.
Serial Numbers: C155653, C155654, C155655, C155651, C155656, C155649, C155648,C155643, C155647, C155645, C155646, C155642, C155644, C155650
In Service: 2/28/1955
Life Cycle: 40 yrs.
Quantity: 15 units.
Size: Unknown
Weight: Untanking 5,875 lbsTank & Fitting 1,850 lbs10C Oil 400 Gallon 3,000 lbsTotal 10,725 lbs
Original Cost: $24,520.79
Condition: They appears to be in good condition.
Location: One transformer is on the concrete pad behind the X-533A Switch Yard and all others are in the X-533A Switch Yard.
14
BUS DUCT SYSTEM
Capabilities: This configuration offers superior strength as well as reduced weight when compared to steel or copper rectangular designs. Provides equalization of reactance between phases – no phase transposition is required on long runs.
Description: A 13.8 KV bus duct system from transformer to building.
Serial Numbers: N/A
In Service: 5/31/1955
Life Cycle: 40 yrs.
Quantity: 1 system.
Size: Unknown
Weight: Unknown
Original Cost: $2,455,204.84
Condition: Good working condition. However, it is past its life cycle.
Location: X-533A Switch Yard.
15
A HEATING AND VENTILATING SYSTEM
Capabilities: Uses a fan to force air through air ducts to create ventilation. Steam coils are routed near the fan to produce heat when it is cold. Steam can be turn on or off according to the need. Oil is used as a filtering system.
Description: Heating and ventilation system.
In Service: 2/28/1955
Life Cycle: 35 yrs.
Quantity: 2 systems and unknown number of feet for ventilation duct.
Size: Unknown
Weight:
Original Cost: $162,251.07
Condition: They appear to be in fair condition and is currently in working condition. However, they are past their life cycle.
Location: One in each Switch House of X-533B.
16
LIGHTING SYSTEM
Capabilities: To provide adequate lighting throughout the switchyard for work to be performed during limited visibility periods.
Description: An interior electric lighting system.
In Service: 3/31/1957
Life Cycle: 30 yrs.
Quantity: 1 system.
Size: Unknown
Weight: N/A
Original Cost: $285,732.01
Condition: It appears to be in fair condition and is currently in working condition. However, it is past its life cycle.
Location: Both X-533B Switch House buildings and control building.
17
FIRE ALARM SYSTEM
Capabilities: System contains manual and automatic alarm initiators. The system contains an audible warning and uses water for fire suppression and/or containment.
Description: Fire Alarm System (Switchhouse). Two separate systems tied together for alarm.
In Service: 2/28/1955
Life Cycle: 35 yrs.
Quantity: 1 system.
Size: Unknown
Weight: Unknown
Original Cost: $147,822.37
Condition: Appears to be in fair condition and is still being relied on. However, it is past its life cycle.
Location: X-533 Complex.
18
CONDENSER SYNCHRONOUS - Large
Capabilities: An apparatus for controlling voltage flicker in power distribution in a substation, comprising a synchronous condenser, a field adjuster for the synchronous condenser and a compensation circuit, apparatus being adapted to compensate the distribution voltage flicker due to a large load variation in substation and being able to adjust a predetermined distribution voltage within an allowable range.
Description: Condenser Synchronous
Serial Numbers: 6999723, 6920463, 6920464, 6999724
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 4 units.
Size: Unknown
Weight: Estimated 240,000 lbs
Original Cost: $855,948.22
Condition: Appears to be in fair condition.
Location: X-533B. There are two at the top of each Switch House.
19
SWITCHGEAR UNIT SUBSTATION – 480 VOLTS
Capabilities: A switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.
Description: Switchgear Unit Substation 480 Volt 3/phase
Serial Number: 31525
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 2 systems.
Size: Unknown
Weight: Unknown
Original Cost: $17,876.86
Condition: Appears to be in good condition.
Location: One in each Switch House at X-533B.
20
CONDENSER SYNCHRONOUS
Capabilities: An apparatus for controlling voltage flicker in power distribution in a substation, comprising a synchronous condenser, a field adjuster for the synchronous condenser and a compensation circuit, apparatus being adapted to compensate the distribution voltage flicker due to a large load variation in substation and being able to adjust a predetermined distribution voltage within an allowable range.
Description: Condenser Synchronous 25000 to 31250
Serial Numbers: 6-S-10088, 6-S-10088, 3-S-10088, 2-S-10088, 5-S-10088, 4-S-10088
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 6 units.
Size: Unknown.
Weight: Estimated 140,000 lbs
Original Cost: $287,743 to $295,657
Condition: Appears to be in fair condition.
Location: X-533B. There are three at the top of the East/West Switch House.
21
SYNCHROSCOPE
Capabilities: In AC electrical power systems, a synchroscope is a device that indicates the degree to which two systems (generators or power networks) are synchronized with each other. Synchroscopes measure and display the frequency difference and phase angle between two power systems.
Description: Synchroscope (including meters fuses)
Serial Numbers: N/A
In Service: 6/30/1955
Life Cycle: 25 yrs.
Quantity: 3 units.
Size: Unknown
Weight: Unknown
Original Cost: $1,291.85
Condition: 2 appear to be in fair condition and one is in poor condition.
Location: X-533B Control Room.
22
INVERTER W/ 5 HP MOTOR
Capabilities: This inverter is capable of running any load within its wattage range.
Description: Inverter with 5HP Motor MODEL 5A51-25
Serial Number: 6931331
In Service: 6/30/1955
Life Cycle: 15 yrs.
Quantity: 1 unit.
Size: Unknown
Weight: Unknown
Original Cost: $2,199.16
Condition: It appears to be in fair condition.
Location: X-533B Carrier Room, West Switch House.
23
TRANSFORMER – DRY TYPE
Capabilities: “Dry type” simply means it is cooled by normal air ventilation. The dry type transformer does not require a liquid such as oil or silicone or any other liquid to cool the electrical core and coils
.Description: Transformer - A 2400/480 Dry Type Transformer
Serial Numbers: KY
In Service: 4/30/1986
Life Cycle: 40 yrs.
Quantity: 2 system.
Size: Unknown
Weight: Unknown
Original Cost: $12,111.60
Condition: Appears to be in good working order with a life cycle that expires in 2026.
Location: One in each X-533B Switch House.
24
GENERATOR - DC
Capabilities: In a direct current generator, the purpose is to change the alternating current (AC), which flows into its armature, into direct current.
Description: Generator DC Motor Emergency 250 VDC
Serial Numbers: 74415, 74416
In Service: 6/30/1955
Life Cycle: 20 yrs.
Quantity: 1 unit.
Size: Unknown
Weight: Unknown
Original Cost: $3623.01
Condition: It appears to be in fair condition and is past original life cycle.
Location: Downstairs of X-533B Control Building
25
DIRECT WRITING OSCILLOGRAPH
Capabilities: A recorder in which the permanent record of varying electrical quantities or signals is made on paper, directly by a pen attached to the moving coil of a galvanometer or indirectly by a pen moved by some form of motor under control of the galvanometer. Also known as mechanical oscillograph.
Description: Oscillograph Direct Writing 12-Channel
In Service: 5/31/1970
Life Cycle: 25 yrs.
Quantity: 1 unit.
Size: Unknown
Weight: Unknown
Original Cost: $66,090.71
Condition: It appears to be in good condition.
Location: X-533B Control Room.
26
TRANSFORMER – 2500 KVA
Capabilities: Each transformer is large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer Power 2500 KVA 13.8 KV/2
Serial Numbers: 31126TRANS-1, 31126TRANS-2
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 2 units.
Size: Unknown
Weight: Unknown
Original Cost: $14,348.10
Condition: They appear to be in good condition even though past life cycle
Location: X-533B East/West Switch House.
27
TRANSFORMER – 2300/480 Volt
Capabilities: Each transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer 2300/480 VOLT 300 KVA
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 2 units
Size: Unknown
Weight: Unknown
Original Cost: $7,257.46
Condition: They appear to be in good condition even though past life cycle
Location: X-533B East/West Switch House.
28
TRANSFORMER – 150 KVA
Capabilities: Each Transformer is a large encased group of metal plates about the size of a small house with 2 sets of insulated copper wires wrapped around the plates -an input and output - to convert a very high supply line voltage to a lower voltage.
Description: Transformer 150 KVA Lighting Stockwell,
Serial Numbers: 15606, 15607, 15608 15609, 15605
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 5 units.
Size: Unknown
Weight: Unknown
Original Cost: $2,727.39
Condition: They appears to be in good condition even though past life cycle
Location: X-533B East/West Switch House.
29
OSCILLOGRAPH – RECORDING FAULT
Capabilities: An oscillograph measures variations of electric current by having it go through a magnetic coil. Variations in current induce momentum in the coil, which can be directly measured.
Description: Oscillograph – A Recording Fault System
Serial Number: 16658
In Service: 10/31/1986
Life Cycle: 25 yrs.
Quantity: 1 units.
Size: In a cabinet
Weight: Unknown
Original Cost: $88,960.67
Condition: Appears to be in good working condition
Location: X-533B Control Building
30
AIR COMPRESSOR UNIT
Capabilities: A compressor takes in air at atmospheric pressure and delivers it at a higher pressure. This pressure is used to operate the three phase switchgears in a substation. Contains pump and air tank.
Description: Air Compressor Unit With Compressor
Serial Numbers: 10120, 10121, 10126, 10124, 10123, 10122, 10125, 10127, 10137, 10138, 10140, 10139, 10142, 10141, 10131, 10135, 10135, 10136, 10132, 10134, 10133, 10130, 10128, 10129, 10143.
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 24 units.
Size: Unknown
Weight: Unknown
Original Cost: $9,442.46
Condition: They appear to be in fair working condition.
Location: East/West X-533B Switch Houses.
31
MAIN CONTROL BOARDS
Capabilities: Monitors and controls the power of the switchyard.
Description: Main Control Boards - A System of Control
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 1 system.
Size: Unknown
Weight: Unknown
Original Cost: $1,395,613.95
Condition: Appears to be in good condition.
Location: X-533B Control Room.
32
SWITCHGEAR – 13800 VOLTS
Capabilities: Each high voltage switchgear is any switchgear used to connect or disconnect a part of a high-voltage power system. These switchgear are essential elements for the protection and safe operation, without interruption, of a high voltage power system. This type of equipment is important because it is directly linked to the quality of the electricity supply.
Description: Switchgear 13,800 VOLT W/11 Air Receiver
In Service: 6/30/1955
Life Cycle: 40 yrs.
Quantity: 13 units.
Size: Unknown
Weight: Unknown
Original Cost: Varies from $418,288.69 to $503,167.69
Condition: They appear to be in fair condition.
Location: X-533A. On top of East/West Switch House.
33
OIL TANK – 15,000 GALLON
Capabilities: They purpose is to store mineral oil in order to be used by transformers.
Description: Tank Oil Storage 15000 gallon capacity
In Service: 2/28/1955
Life Cycle: 40 yrs.
Quantity: 2 units
Size: Unknown
Weight: Unknown
Original Cost: $6,001.50
Condition: They appear to be in good shape.
Location: X-533A (West End)
34
OIL TANK – 34,000 GALLON
Capabilities: They purpose is to store mineral oil in order to be used by transformers.
Description: Tank Oil Storage 34000 gallon capacity
In Service: 2/28/1955
Life Cycle: 40 yrs.
Quantity: 2 units.
Size: Unknown
Weight: Unknown
Original Cost: $10,923.50
Condition: They appear to be in good condition.
Location: X-533A (West End)
35
OIL FILTERING SYSTEM
Capabilities: Contained mineral oil to heat and pump oil through transformers in order to filter out impurities.
Description: Oil Filtering System with minor tank
In Service: 8/31/1974
Life Cycle: Unknown
Quantity: 1 system
Size: Unknown
Weight: Unknown
Original Cost: $65,696.07
Condition: It appears to be in good working condition
Location: X-533A (West End)
36
AIR CONDITIONER - WINDOW
Capabilities: They re-circulate and cool air to regulate temperature in Control Room.
Description: Air Conditioner 220 Volt Friedrich
In Service: Unknown
Life Cycle: Unknown
Quantity: 2 units.
Size: Unknown
Weight: Unknown
Original Cost: Unknown
Condition: They appear to be in good working condition and are working.
Location: X-533A Control Building
37
LUBE OIL PUMPS
Capabilities: Pump oil and create oil pressure into the synchronous condenser. It moves middle of synchronous condenser into place until the rotation speed will hold it by itself.
Description: Lift and lube oil pumps
In Service: Unknown
Life Cycle: Unknown
Quantity: 8 systems
Size: Unknown
Weight: Unknown
Original Cost: Unknown
Condition: They appear to be in fair working condition.
Location: X-533B East/West Switch House.
38
Heating and Vent Fan
Capabilities: The substation ventilation is designed to optimize air circulation over and around the transformers and through the panel compartment so that the substation operates at lower temperatures.
Description: Heating and Vent Fan
In Service: 3/31/1957
Life Cycle: 30 yrs..
Quantity: 1 system
Size: Unknown
Weight: Unknown
Original Cost: $162,251.07
Condition: It appears to be in good working condition
Location: X-533B West Switch House
39
Hot Water Heater
Capabilities: A heating system that uses steam generated from a boiler. The steam heating system conveys steam through pipes to heat exchangers, such as radiators, convectors, radiant panels, or fan-driven heaters, and returns the resulting condensed water to theboiler. Such systems normally operate at pressure not exceeding 15 lb/in.2 gage or 103 kilopascals gage, and in many designs the condensed steam returns to the boiler by gravity because of the static head of water in the return piping. With utilization of available operating and safety control devices, these systems can be designed to operate automatically with minimal maintenance and attention.
Description: Steam Fan
In Service: Unknown
Life Cycle: Unknown
Quantity: 16 yrs.
Size: Unknown
Weight: Unknown
Original Cost: Unknown
Condition: Condition varies from poor to good.
Location: X-533B East/West Switch House
40
ELECTRIC HEATER
Capabilities: A device for heating rooms that converts electric current to heat by means of resistors that emit radiant energy. Resistors may be composed of metal-alloy wire, nonmetallic carbon compounds, or printed circuits. Heating elements may have exposed resistor coils mounted on insulators, metallic resistors embedded in refractory insulation and encased in protective metal, or a printed circuit encased in glass. Fins may be used to increase the area that dissipates the heat.
Description: 480 Volt Heater
In Service: Unknown
Life Cycle: Unknown
Quantity: 16 yrs.
Size: Unknown
Weight: Unknown
Original Cost: Unknown
Condition: They appear to be in good working condition
Location: X-533B East/West Switch House.