Product Bulletin. Zenith Controls. Automatic Transfer Switch. ZTG Series. Fully Approved. Design and Construction Features

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1 e G Zenith Controls Product ulletin ZTG Series utomatic Transfer Switch LD/LCD indicators for ease of viewing and long life Nonvolatile memory clock battery backup not required for standard switch operation Processor and digital circuitry isolated from line voltage Inputs optoisolated for high electrical immunity to transients and noise Communications header for network interface G Zenith s ZTG Series switches are built for standard applications requiring the dependability and ease of operation found in a power contactor switch. Ratings to 3 amps ( or poles) UL 8 listed at 8 VC CS certified at 6 VC (2-225 amp - 8V) IC listed at 8V Double throw, mechanically interlocked contactor mechanism lectrically operated, mechanically held Designed for emergency and standby applications vailable in standard (ZTG) or delayed transition (ZTGD) models ZTG switches are equipped with G Zenith s next-generation MX5 microprocessor panel, which controls the operation and displays the status of the transfer switch s position, timers and available sources. s an embedded digital controller, the MX5 offers high reliability and ease of unattended operation across a range of applications. The MX5 features include: Timer and voltage/frequency settings adjustable without disconnection from the power section uilt-in diagnostics with an LCD display for immediate troubleshooting Fully pproved UL, CS and IC listed Ringing wave immunity per I 72 (NSI C37.9) Conducted and Radiated missions per N5522 Class (CISPR ) (xceeds N55 & MILSTD 6 Class 3) SD immunity test per N6--2 (Level ) Radiated RF, electromagnetic field immunity test per N6--3 (NV5) v/m lectrical fast transient/burst immunity test per N6-- Surge immunity test per N6--5 I C62. (.2 X 5ms, 5 & 8 kv) Conducted immunity test per N6--6 (NV5) Voltage dips and interruption immunity N6-- Design and Construction Features Close differential 3 phase under-voltage sensing of the normal source factory standard setting 9% pickup, 8% dropout (adjustable); under-frequency sensing of the normal source factory setting 95% pickup (adjustable) Voltage and frequency sensing of the emergency source factory standard setting 9% pickup voltage, 95% pickup frequency (adjustable) Test switch (fast test/load/no load) to simulate normal source failure automatically bypassed should the emergency source fail Type enclosure is standard also available in open style or Types 3R, or 2 P-2N (5/3)

2 Standard Features and Options Standard Features (MSTDG Option Pkg.) 6 Test Switch, Momentary 3 uxiliary Contact: Closed when the switch is in the emergency position uxiliary Contact: Closed when the switch is in the normal position U W Time Delay for ngine Cool Down: llows engine to run unloaded after switch retransfer to normal. Time Delay on Transfer to mergency: To delay transfer to emergency after verifying emergency source available. MX5 Control Panel S O K * * 2 : 5 6 M O N 3 P R 2 3 MOR T S T Calibrate CDT DS Capabilities are available for Frequency and, C, C Phase to Phase voltage for both Sources. Daily 7,, 28 timed exercise (CDT memory backup battery included), pushbutton/timer operation Inhibits transfer in either direction when in inhibit. llows automatic operation when in uto. (8- mp units) YN Q2 Pushbutton ypass of T & W Timers Peak Shave / Remote Load Test When specified for use with a ZTGD Series delayed transition switch, the control panel also includes the following: DT Time Delay from Neutral Switch Position to Normal on Retransfer. MX5 (Front View) ngine Start Contact DW Time Delay from Neutral Switch Position to mergency. L/P vent Log od 6 vents that track date, time, reason and action taken S3 Center-Off position/off Delay Timing indicating lights K/P Frequency Indication for S and S2 L P Indicating LD Pilot Lights: L Indicates switch in emergency position L2 Indicates switch in normal position L3 Indicates normal source available L Indicates emergency source available Time Delay to ngine Start. dditional Standard Features (MXG Option Pkg.) 3 uxiliary Contact: Closed when the switch is in the emergency position R5 In-Phase Monitor, self-adjusting uxiliary Contact: Closed when the switch is in the normal position T Time Delay on Retransfer to Normal: To delay retransfer to normal source (immediate retransfer on generator set failure). CDP VI Clock xerciser Load/No Load (Replaces CDT) Voltage Imbalance Monitor (Three Phase) P-2 Page 2

3 NOT: For applications requiring additional options or other configurations, use G Zenith ZTS Series switches as described in ulletin O-56. Options 6 6P Test Switch, Maintained / Momentary Test Switch, Maintained / Momentary, utilizing Keypad uxiliary Contact, operates on Source line failure uxiliary Contact, operates on Source line failure M8 SRIS POWR MSURMNT MTRS M8 M82 M83 Digital Meter w/display of mps, Volts, Frequency Digital Meter w/display of mps, Watts, Volts, Frequency, KV, KVR, PF, etc. Digital Meter w/diplay of mps, Watts, Volts, Frequency, KV, KVR, PF, etc. Plus THD capability w/modbus RS85 part 3 62 CTP DS HT uxiliary Contacts: Closed when the transfer switch is in Source 2 position. uxiliary Contacts: Closed when the transfer switch is in Source position. Motor Load Disconnect Circuit: N.C. operates during transfer; adjustable (not available on ZTGD models or models with R5); includes timing indicator lamp; adjustable -3 seconds larm panel on transfer to emergency w/silence button & light Inhibits transfer in either direction when in inhibit. llows automatic operation when in uto. (-6 mp units) Heater and Thermostat T3/W3 levator Pre-Signal uxiliary Contacts: Open -6 seconds prior to transfer to either direction, re-closes after transfer. UMD VI ZNT Universal Motor Load Disconnect Circuit: uxiliary Contact opens -6 seconds prior to transfer in either direction, re-closes after transfer. Can be configured by end user for Pre-transfer, Post-transfer, or both. Voltage Imbalance Monitor (Three Phase) Network communications interface card Page P-2

4 Reference Charts Testing Standards UL, CS and IC listed UL 8, CS 22.2 No. 78, IC Ringing wave immunity Conducted and Radiated missions I 72 (NSI C37.9) N5522 Class (CISPR ) (xceeds N55 & MILSTD 6 Class 3) SD immunity test N6--2 (Level ) Radiated RF, electromagnetic field immunity test lectrical fast, transient/burst immunity test N6--3 (NV5) v/m N6-- Surge immunity test N6--5 I C62..2 X 5µs, 5 & 8 kv Conducted immunity test Voltage dips and interruption immunity N6--6 (NV5) N6-- L/CU UL Listed Solderless Screw-Type Terminals for xternal Power Connections Normal, mergency and Load Terminals Switch Size (mps) 8 5 Cables per Pole Range of Wire Sizes #8 to 3/ WG 6-7 mm 2, 225 #6 WG to 25 MCM -2 mm 26, 3, 6 2 8,, 2 # WG to 6 MCM #2 WG to 6 MCM 6, 2, 26, 3 8 #2 WG to 6 MCM 6-3 mm 25-3 mm 25-3 mm MX5 Control Setting Ranges Control Function Range Factory Setting Source Line Sensing Under-voltage Dropout 75-98% 8% Pickup 85-% 9% Source 2 Line Sensing Under-voltage Dropout 75-98% 8% Pickup 85-% 9% Source 2 Line Sensing Under-frequency Dropout 2Hz below pickup Set Pickup 9-% 95% Time Delay ngine Start (cc. P) - seconds 3 seconds Time Delay ngine Cool Down (cc. U) -6 minutes 5 minutes Time Delay Transfer to mergency (cc. W) -5 minutes second Time Delay Retransfer to Normal (cc. T) -6 minutes 3 minutes Time Delay Motor Disconnect or Transfer Presignal (cc. UMD, or T3/W3) -6 seconds 2 seconds Delayed Transition Time Delays (DT, DW) - minutes 5 seconds Page 5 P-2

5 Ordering Information Z T G ase Model Type Control Panel Config. mpere Size Switched Poles nclosure Type Operational Voltage ccessories Switch Types Standard (Open Transition) Delayed Transition MX5 Microprocessor Control Unit Standard: Unless otherwise noted, the standard switch with quick transfer will be supplied. Delayed Transition: When ordered as the ZTGD, the delayed transition switch offers time delay during transfer from one position to the other. This is primarily for transfer of large motor or inductive loads. The operation of the delayed transition switch is totally independent of the synchronism of the power sources, eliminating the need for in-phase monitors or extensive motor-disconnect control wiring between the transfer switch and motor control centers. xample ZTGD-NSTD This number string shows the correct format for a ZTG Series utomatic Transfer Switch with delayed transition, an MX5 microprocessor control unit, Utility - Generator, amps, 3 pole, NM Type enclosure, 2/28V 3Ø, wire, 6 Hz system with the standard group of accessories. D Utility - Generator U Utility - Utility M Manual amps amps amps 5 5 amps 2 2 amps amps amps amps 6 6 amps 8 8 amps amps 2 2 amps 6 6 amps 2 amps 6 26 amps 3 amps 2 Poles 3 Poles F Poles N Type nclosed N 2 Type 2 nclosure N 3 R Type 3R nclosure N 3 X Type 3X nclosure N Type nclosure N X Type X nclosure X Open Style Unit 2 2/2V Ø, 3 wire, 6Hz 2 2/28V Ø, 3 wire, 6Hz 3 2V 3Ø, 3 wire, 6Hz 3 28V 3Ø, 3 wire, 6Hz V 3Ø, 3 wire, 5Hz 3 8 2/2V 3Ø, wire, 6Hz 2/28V 3Ø, wire, 6Hz 27/22V 3Ø, wire, 6Hz 5 8V 3Ø, 3 wire, 6Hz 5 V 3Ø, 3 wire, 6Hz 5 2 V 3Ø, 3 wire, 5Hz 5 3 V Ø, 2 wire, 6Hz 6 575V 3Ø, 3 wire, 6Hz 6 37/6V 3Ø, wire, 6Hz 7 277/8V 3Ø, wire, 6Hz S T X 6 6P 3 62 CTP DS HT M83 D Then choose additional accessories M8 M82 T3/W3 UMD VI ZNT None 9 ZTG Switch Ratings (mps), 8, 5 2, 225 6, 8, 2 6, 2 26, 3 Withstand Current Ratings per UL 8 Maximum Circuit mps When Used With Current Limiting Fuse ZTG/ZTGD Specific Coordinated reaker Rating 3, 26, 5, 2, 65, 85,, ZTGD Switch Ratings (mps), 8,, 5, 225, 26, 6, 8, 2 6, 2 26, 3 Maximum Circuit mps When Used With Specific Coordinated reaker Rating 5, 65, 85,, 2/6V 3Ø, wire, 6Hz 9 22/38V 3Ø, wire, 6Hz /38V 3Ø, wire, 5Hz 9 3 2/6V 3Ø, wire, 5Hz P-2 Page 3

6 Dimensional Specifications ZTG and ZTGD Series Transfer Switches Model ZTG ZTGD ZTG mpere Rating, 8, 5, 2, 8,, 5, 225, 225, 26 3, 6 Poles 3 Height () 2 (6) 2 (6) 6 (7) 6 (7) 66 (68) 7 (88) 7 (88) 7 (88) 9 (229) 9 (229) NM nclosed Width () 8 (6) 8 (6) 2 (6) 2 (6) 2 (6) 3 (76) 3 (76) 3 (76) 3 (76) 36 (9) Depth (C).75 (27).75 (27).3 (36).3 (36) 9.75 (5) 9.75 (5) 9.75 (5) 9.75 (5) 8 (22) 8 (22) Ref. Fig (9) 2 (6).3 (36) 26, 8,, 2 6, 2 26, 3 6 (7) 6 (7) 2 (6) 2 (6).3 (36).3 (36) C C Weight NM 57 (26) 6 (27) 5 (68) 55 (7) 8 (82) 85 (8) 22 () 23 (2) 75 (8) 8 (82) (8) 5 (2) 75 (25) 56 (25) (58) 6 (526) pp. Notes , 7 5, 7 5, 7, 8 pplication Notes:. Metric dimensions (cm) and weights (kg) shown in parentheses adjacent to nglish measurements. 2. Includes.25" door projection beyond base depth. llow a minimum of 3" additional depth for projection of handle, lights, switches, pushbuttons, etc. 3. ll dimensions and weights are approximate and subject to change without notice.. Packing materials must be added to weights shown. llow 5% additional weight for cartons, skids, crates, etc. 5. Special enclosure (NM 3R,, 2, etc.) dimensions and layouts may differ. Consult factory for details. 6. ZTG -2 may require larger enclosure depending on options specified. Consult factory for details. 7. dd 3" in height for lifting eyes. 8. Ventilation louvers on rear of enclosure at 3 amps. One side or rear must be clear for airflow with standard cable connections. Reference Figures C C C Figure ZTG Series Transfer Switch (- amp) Figure ZTG Series Transfer Switch (6-2 amp) Figure C ZTG Series Transfer Switch (6-3 amp) g G Zenith Controls Product of G Industrial Systems General lectric Company 83 West th Street, Chicago, IL 669 US , Fax: