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SPD Electrical SystemsSPD Electrical Systems

P ro d u c t D e s c r i p t i o n

With over 100 years of experience dating back to Henry

Cutter’s first “inverse time element” circuit breaker in the late

nineteenth century, L-3 SPD Electrical Systems (L-3 SPDES)

is the world’s leading supplier of innovative shock-hardened

circuit breakers and switchgear for harsh environment

applications.

L-3 SPDES’ Navy Type ACB-2012 is a draw-out style, low-

voltage air circuit breaker that is rated for a continuous

current of 2,000 A at 500 VAC and a symmetrical interrupting

rating of 85 kARMS. The L-3 ACB-2012 is a removable circuit

breaker assembly that fits into a stationary cradle with a fold-

down track extension, making it ideal for applications where

integrated control, condition-based maintenance, and power

monitoring are required.

Originally a commercial design, L-3 SPDES has ruggedized

the ACB-2012 circuit breaker assembly to qualified military

specifications MIL-C-017587; MIL-S-901, Grade A; and MIL-

STD-167-1, 4 to 60 Hz for use in harsh conditions experienced

on board navy ships. The circuit breaker is designed for easy

front access so that the unit can be controlled and monitored

safely through an access port on the front door of a switchgear

enclosure.

HIGHLIGHTS

• Potential replacement for ACB-1606HRC and ACB-2010HRC

• Ruggedized commercial design qualified to military specifications

• Easy front access for convenient manual control

• Sophisticated electronic protection module

• Quick and easy removal from cradle

• Closing spring charged either automatically or manually

• Breaker position and closing spring status flags

• Optional indicator light

• Optional Electromechanical Undervoltage Lockout AVAILABLE FEATURES

FEATURE STANDARD OPTIONAL FIELD- SELECTABLE

Electrical Closing Mechanism 3

Hold Close 3 3

Racking Mechanism Lockout (Mechanical) 3

Mechanical Racking Position Indicator 3

Secondary Disconnect Terminal Blocks (Qty. 30) 3

Operations Counter 3

Overcurrent Protection 3 3

Electromechanical Undervoltage Lockout (UVLO) 3

Indicator Light 3

RATINGS (Circuit Breaker and Attachments) Maximum Continuous Current (Amperes) 2,000

Continuous Current Setting (Amperes) (100 A increments) 500 to 2,000

Rated Maximum Volts (60 Hz) 500

Maximum Interrupting Rating - Symmetrical Short Circuit Current (Amperes) 85,000

Rated Short-Time Current Delay at 85kA (Seconds) 0.5

Number of Poles 3

Number of Protected Poles 3

Auxiliary Switch – No. of Available Contacts 8 (4 ‘A’ and 4 ‘B’)

Auxiliary Switch Ratings 120VAC, 15A / 500VAC,15A

Secondary Disconnect Terminal Block Current Rating 10 A

Operating Temperature 0 ºC to +50 ºC

L-3 SPD Electrical Systems

13500 Roosevelt Boulevard

Philadelphia, PA 19116

Tel: 215-677-4900

Email: info.spdes@L-3com.com

L-3com.com/SPDES

NOTES

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• Opening: The opening of the breaker can be initiated with or without control power applied using the red PUSH OFF push-button

• Charging: The closing springs can be charged, either automatically (when control power is applied to the charging motor) or manually (using the charging handle) after the breaker has been opened

• Closing: Once the closing springs have been charged, the breaker can be closed using the green PUSH ON push-button with or without control power applied

• Resetting a fault trip: If a protective trip occurs, the reset button on the protective device can be used to clear the fault alarm after the cause is resolved

OPERATION

The main operations of the circuit breaker are as follows:

Approved for Release. Distribution is unlimited.

SPD Electrical SystemsSPD Electrical Systems

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A I R C I R C U I T B R E A K E R A C B - 2 0 1 2

CRADLE FEATURES

The cradle is designed for installation into a switchboard using two mounting brackets located under the cradle (one in the front and one near the back). Once installed, the cradle provides the following features:

Current (Multiple of Ir)

Cradle Dimensions (Track Extension Lowered)

PHYSICAL CHARACTERISTICS

ASSEMBLY WIDTH HEIGHT DEPTH WEIGHT

Circuit Breaker 16.5 in. 17.7 in. 16.5 in. 202 lb. (41.9 cm) (45.0 cm) (41.9 cm)

Cradle 17.66 in. 20.85 in. 17.30 in. 130 lb. (Track Extension (44.9 cm) (53.0 cm) (43.9 cm) Raised)

Cradle See See 33.97 in. See (Track Extension Above Above (86.3 cm) Above Lowered)

Maximum Overall (DISCONNECT position See See 34.35 in. 332 lb. on TE with optional Above Above (87.2 cm) indicating light)

Cradle Mounting Dimensions (Bottom View)

PROTECTION

The L-3 SPDES circuit breaker is equipped with a sophisticated electronic protection module to provide configurable power monitoring capabilities and automatic equipment protection. The built-in electronic protection module enables:

SYSTEM STATUS

• Protection module – shows operating status using LED indicator lights and messages displayed on the 3-line LED display

• Racking mechanism – contains flags that indicate when the breaker is fully in the CONNECTED, TEST, or DISCONNECT poitions

• Operating mechanism – the Charged/Discharged and Open/Closed status indicator flags are mechanically linked to the auxiliary switch to show breaker status

• Optional – an indicator light can be added at the bottom of the breaker to the left of the racking mechanism for user-defined status

ADJUSTABLE LONG-TIME 2 to 24 seconds in 0.5 second increments DELAY SETTING

ADJUSTABLE Short-Time 0.1 0.2 0.3 0.4 0.5 SHORT-TIME Delay Band DELAY SETTING Delay 0.06 0.15 0.22 0.32 0.42 (Seconds) to to to to to 0.13 0.22 0.30 0.40 0.50

INSTANT Multiples PICKUP Of 2,000 Off 2X 2.5X 3X 3.5X 4X 4.5X 5X 5.5X 6X 6.5X SETTING Ampere Frame Ratings 7X 7.5X 8X 8.5X 9X 9.5X 10X 10.5X 11X 11.5X 12X (0.5 Increments)

• Access to real-time and stored monitoring data

• Control functions using either a laptop with control software installed or the three-line LED display and tactile push-buttons

• Monitoring of breaker status and resetting after a trip event right from the front of the breaker

• Adjustable long-time, short-time, and instantaneous trip signals as shown here:

• Cradle track extension arm – the track extension arm holding the breaker in position can be lowered and used to rack out and/or hold the circuit breaker in the TEST or DISCONNECT positions using two locking pins (stored in a locking block on the front cover)

• Line and load conductors – three pairs located in the back for connecting three phases of buswork

• Secondary disconnect assembly – the secondary disconnect terminal blocks and connectors provide customer connections to the circuit breaker control and monitoring circuits

• 300 VAC control power step-down transformer - converts a 450 VAC input signal to 120 V internal control voltage

Long-Time, Short-Time &Instantaneous Pickup Settings