4, 6, OR 8 INDIVIDUAL 20-AMP BRANCH CIRCUITS

SwitchLITETM

MODEL EZT

Emergency Zone Transfer Cabinet

Automatic transfer between normal and emergency

power for emergency lighting and life safety circuits.

Applications:• Theaters / Concert Halls• Worship Facilities• Conference Centers• Auditoriums• Restaurants• Banquet Halls• Casinos• Sports Facilities

UL 1008C-UL CSA C22.2, No. 178.1

The SwitchLITETM Model EZT, Emergency Zone Transfer Cabinet, allows dimmable lighting fixtures to function as essential emergency lighting. The Model EZT is a UL 1008 listed product, designed to automatically transfer up to eight (8) branch circuits to emergency power when normal power fails, and then back to normal power once it has been restored. Upon transfer to emergency power, lighting fixtures that are dimmed (or off) are brought to full illumination to provide safe egress.

DESCRIPTION & APPLICATION

2 © May 2012. Controlled Power Company. SwitchLITETM and ZoneSaver™ are trademarks of Controlled Power Company.

Model EZT ApplicationFigure 1 illustrates the Model EZT used in a dimmer rack application. As shown, the hot and neutral legs of each dimmer output circuit feeding normal/emergency lighting are wired to one side of the Model EZT’s automatic transfer switch. The other side of this switch is wired to the emer-gency power source. When normal power is lost or below an acceptable level, both legs are automatically transferred to emergency power.

To satisfy various applications, user-adjustable settings are provided to control the transfer delay time to and from emer-gency power. Note that optional auxiliary form C contacts are available for each circuit to accommodate low voltage or line voltage ballast control signal applications.

Unique to the Model EZT, an emergency power Soft Start Control (SSC) is provided to accommodate the high inrush current associated with energizing certain types of light fixtures.

Emergency Power SourceFigure 2 illustrates the Model EZT’s interface with an emergency lighting inverter or a standby generator as the emergency power source. A Controlled Power Company centralized emergency lighting inverter is a true uninterruptible power source, and is ideal in this application. A normally closed “test in progress” contact from the inverter is connected to the Model EZT’s Remote Command Transfer (RCT) input. This contact will open during NFPA-mandated test periods, and the designated emergency lighting circuits will be automatically transferred from normal to emergency power. In a standby generator application, the emergency lighting circuits will experience a momentary loss of power, dictated by the time it takes for the emergency generator to come on line. To ensure that emergency lighting circuits are transferred from normal to emergency power during NFPA-mandated tests, the Model EZT’s RCT input may be connected to a normally closed contact that opens when the facility’s Automatic Transfer Switch (ATS) has transferred generator power to the normal/emergency power panel.

EMERGENCYPOWER

HOT

NEUTRAL

NORMAL / EMERGENCY

LIGHTING

HOT

NEUTRAL

DIMMERRACK

DIMMER OUTPUT TO NON-EMERGENCY

LIGHTING

DIMMER OUTPUT TO NORMAL / EMERGENCY

LIGHTING

AUXILIARY CONTACTSFOR BALLAST CONTROLSIGNAL APPLICATIONS

- FIRE ALARM- INVERTER TEST- GENERATOR TEST

STATUSALARM

CONTACTS4, 6 OR 8 CIRCUITS(1 CIRCUIT SHOWN)

NORMALPOWER

NORMAL POWER SENSING

SwitchLITE Model EZT

SSC RCT

(Figure 1)

NORMAL POWER SENSING

REMOTE COMMANDTRANSFER (RCT), SIGNAL INPUT

NORMAL (DIMMED) POWER

RCT

RCT

SwitchLITEModelEZT

NORMAL / EMERGENCY

LIGHTING

OR

NORMALPOWER

NORMALPOWER

EMERGENCYPOWER

(GENERATOR)

NORMAL / EMERGENCY

POWER

EMERGENCYLIGHTINGINVERTER

NORMAL / EMERGENCY

PANEL

ATS

(Figure 2)

NFPA-mandated 30-day and annual tests may be automatically

performed by the Controlled Power Company emergency lighting

inverter, with the test results time / date stamped and logged.

SPECIFICATIONS & FEATURES

Product SpecificationsNormal Power Circuits• Branch Circuit Voltage: 120 VAC or 277 VAC or 347 VAC,

60 hertz • Branch Circuit Amperage: Rated for 20 amps maximum

each circuit, internally fused • Number of Branch Circuits: 4, 6 or 8 individual circuits • Branch Circuit Configuration: Standard 2 wire plus ground,

or 2 wire plus ground with an optional low voltage or line voltage ballast control signal

• Voltage Sensing of Normal Power Source: Single phase 120 VAC, 277 VAC, or 347 VAC (1 wire plus neutral)

240/120 VAC or 208/120 VAC (2 wire plus neutral) Three phase 208 VAC, 480 VAC, or 600 VAC (3 wire plus neutral)

Environmental Specifications• Operating Temperature: 0°C to 40°C • Relative Humidity: 95% non-condensing • Elevation: 5,000 ft. (1,500 meters) maximum,

without de-rating • BTU/HR: 255 maximum

Safety / Standards• Listed to UL 1008 Transfer Switch Equipment, Automatic

Transfer Switch for Emergency Systems, 10,000 amp SCCR• C-UL Listed to CSA Standard C22.2 No. 178.1,

Automatic Transfer Switches• Complies with ANSI / NFPA 110 Standard for Emergency

and Standby Power Systems• Satisfies requirements of the National Electric Code (NFPA

70): Articles 700, 701, 702; 518.3C, 520.7, 540.11C

3

The SwitchLITE Model EZT automatic transfer switch is electrically operated and mechanically held (maintained) to prevent inadvertent connection of the normal and emergency sources. When switching between two separate power sources, only a UL 1008 listed product may be used. The Model EZT’s rugged and smart design brings performance and reliability to critical emergency lighting applications.

Emergency Power Source• Main and Branch Circuit Voltage: 120 VAC or 277 VAC

or 347 VAC, 60 hertz • Input Circuit Breaker Required*: 60 amp maximum, 1 pole • Branch Circuit Amperage: Rated for 20 amps maximum

each circuit, internally fused• Maximum Continuous Current: 48 amps • Branch Circuit Configuration: Normal power circuit

configuration is maintained and supplied with emergency power

* Input circuit breaker provided by others, and field-installed external to Model EZT enclosure.

Emergency Power Transfer• Undervoltage Automatic Transfer: User-selectable at -20%

or -50% from normal power nominal voltage • Adjustable Transfer Delay: Transfer to emergency power

0 to 9 seconds; transfer from emergency power back to normal power 0 to 15 minutes

• Soft Start Control: User-selectable 0, 0.5, 1.0, or 2.0 seconds voltage ramp

Note: Optional auxiliary form C contacts are available for each circuit to accommodate ballast control signal applications. In emergency mode, auxiliary contacts switch state, and may be used to apply the designated “full on” control signal to each fixture.

Set of 8 Conduit Knockouts: Located on top and each side of the cabinet, provided for normal / emergency branch circuits. Additional conduit knockouts provided for volt-age sensing and Emergency Power Connection

Keyed Cabinet Door for security

Slotted Flange for easy wall-mounting

Magnified view of Status Monitor

Status lights indicate whether the load is being fed from Normal or Emergency Power.

Note: Emergency Power Connection light is illuminated when a voltage source is present on the emergency pow-er input terminals. This voltage source may be either the emergency lighting inverter output, or a facility’s designated normal / emergency power panel.

Manual testing is initiated via a keyed switch which simulates a power failure.

Disclaimer: Location of conduit knockouts is for illustrative

purposes. Consult factory for installation drawings.

MODEL SELECTION GUIDE

1955 Stephenson Hwy., Troy MI 48083www.controlledpwr.comemail: info@controlledpwr.comPhone: (800) 521-4792 Fax: (248) 528-0411

All information and data within this brochure is subject to change without notice.

EZT-001-0512

Represented by:

MODEL SELECTION GUIDE

Model Number Example: EZT - AX - 8CKT - 1 Description: Quantity of eight (8), 20 amp circuits, 120 VAC (2 wire + ground), with auxiliary contacts for each circuit.

PRODUCT CIRCUIT VOLTAGE FREQ NUMBER OF CIRCUITS AUX CONTACTS

EZT A = 120 VAC X = 60 Hz 4CKT 0 = No Contacts

J = 277 VAC 6CKT V = 347 VAC 8CKT 1 = Auxiliary Contacts Included Note: “Form C” Contacts provided for each 20 amp circuit

Model EZT Enclosure• Description: NEMA 1, powder-coated steel construction with a hinged, key-lockable front door• Wiring: Provisions for class 1 and class 2 requirements• Dimensions: 20” W x 7.75” D x 31” H• Weight: 84 lbs. maximum

ZoneSaverTM UL924 ApplicationControlled Power Company’s ZoneSaver is a UL 924 listed product containing two (2) emergency load control relays. The ZoneSaver allows for user control of emergency egress lighting via occupancy sensors, wall switches, and dimmer switches.

Figure 3 illustrates the ZoneSaver used in a wall switch application. As shown, a single normal / emergency power source is wired to egress lighting fixtures through the two (2) wall switches. In the event of a power outage, the wall switches are automatically bypassed and emergency power is made available to egress lighting.

ZoneSaver is capable of supplying two (2) separate 1 pole, 20 amp circuits at 120 VAC or 277 VAC, or a single 2 pole, 20 amp circuit at 208 VAC or 240 VAC.

ZoneSaver is equipped with status lights and a test switch to manually test emergency circuits per NFPA 101.

Contact the factory for application and product details.

ZoneSaver Illustration

Note that UL 924 listed load control (shunt) relay devices may not

be used when switching between two (2) separate power sources.

(Figure 3)

WARRANTY: The Model EZT is guaranteed to be free from defects in material and workmanship for a period of two (2) years following shipment from the factory.

WARRANTY: The ZoneSaver is guaranteed to be free from defects in material and workmanship for a period of one (1) year following shipment from the factory.