Ametek ZF2 SCR Series, Instruction, Operation And Maintenance Manual

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Description ZF2/ZF3 SCR Power Controller
4 Ametek HDR Power Systems Rev 3
Table 1.2 General Specifications of ZF2/ZF3 Models
Input line voltage: * 120, 240, 400, 480, or 575 Vac,
+10%, -15% , Three-phase
Line frequency: * 50 or 60 Hz
Current rating: * As indicated by model number (refer to Table 1.1)
Thermostat contact rating: 120 Vac, 5 A; resistive
Input Signal:
Non-isolated
Isolated
0 to 1.5 V (min); 0 to 10 V (max)
0 to 6 mA (min); 0 to 20 mA (max)
Control methods: 1. Potentiometer, 5 kΩ, 1/2 watt (Customer-supplied).
2. Dry contact closure (customer-supplied).
3. Temperature or process controller **
Control signal input impedance:
Non-isolated input
Isolated input 1500 Ω
500 Ω
Control signal isolation:
From SCRs 2,500 Vac
From ac power input lines 2,500 Vac
From chassis 500 Vac
Power output:
Power output linearity versus
control signals input +3%
Power SCRs protection:
Current surge Subcycle I² T semiconductor fuse.
Transient voltage spikes (dv/dt)
Metal Oxide Varistor (MOV) and R-C snubber across each SCR pair; all
SCRs have PIV rating of 1,400 V.
Three-phase voltage
imbalance 5% maximum from leg to leg
SCCR Rating 100kA
Miscellaneous:
Zero-firing timebase Variable see 6.3
Controls: ZERO and SPAN potentiometers; 10-turn, screwdriver-adjustable.
Approvals UL/cUL (E151547), CE
Fan-cooling power (as applicable):
ZF2 ZF3
For 90 A through 225 A units 0.21 amperes, 50 VA (50 Hz)
0.19 amperes, 46 VA (60 Hz) 0.42 amperes, 50 VA (50 Hz)
0.38 amperes, 46 VA (60 Hz)
For 350 A through 500 A units 0.42 amperes, 76 VA (50 Hz)
0.46 amperes, 69 VA (60 Hz) 0.63 amperes, 76 VA (50 Hz)
0.57 amperes, 69 VA (60 Hz)
For 650 A through 1200 A units 2.8 amperes, 504 VA (50 Hz)
2.4 amperes, 432 VA (60 Hz)
4.2 amperes, 504 VA (50 Hz)
3.6 amperes, 432 VA (60 Hz)
Ambient Temperature range:
Environment 32 ºF to 122 ºF ( 0 ºC to 50 ºC) surrounding air
Pollution degree 2
Overvoltage Category III
Storage 14 ºF to 158 ºF ( -10 ºC to 70 ºC)
Weight per unit Current Rating ZF2 ZF3
60 through 225 A
350, 500 A
650 A
800, 1000, 1200 A
31 lbs
41 lbs
87 lbs
180 lbs
14.1 kg
18.6kg
39.6 kg
47.6 kg
40 lbs
60 lbs
126 lbs
231 lbs
18.2 kg
27.3kg
57.3 kg
104.8 kg
Outline and mounting: See appropriate drawing in Appendix
* Specify with order