Chromalox CFW, Руководство по эксплуатации оборудования, Страница: 79 / 84

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POWER (SOLID-STATE RELAY) (400 to 600A Models)
CATEGORY OF USE
(Tab. 2 EN60947-4-3)
AC 51 resistive or low inductance loads
AC 55b short wave infrared lamps (SWIR)
AC 56a transformers, resistive loads with high temperature coefficient
Trigger Mode
PA - Load management by adjusting the firing angle (only
configuration single-phase or delta open)
ZC - Zero Crossing with constant cycle time (settable in range
1-200sec)
BF - Burst Firing, or D.O.T. with variable cycle time optimized min.
HSC - Half Single Cycle corresponds to Burst Firing that includes ON
and OFF half-cycles.
Useful for reducing flicker with short-wave IR loads (applied only to
single-phase resistive or 3-phase 6-wire open delta loads).
Feedback Mode
V, V
2
: Voltage feedback: proportional to RMS voltage value on
load to compensate possible variations in line voltage.
I, I
2
: Current feedback: proportional RMS current value on load to com-
pensate variations in line voltage and/or variations in load impedance.
W: Power feedback: proportional to real power value on load to
compensate variations in line voltage and/or variations in load imped-
ance. You have to calibrate each time you change feedback mode.
Max rated voltage 480Vac to 600Vac or 690V
Operating1 voltage range
90 - 530 Vac
(480V Models)
90 - 660 Vac
(600V Models)
90 - 760Vac
(690V Models)
Non-repetitive voltage 1200 Vp 1600 Vp (600V Models) 1600 Vp (690V Models)
Rated frequency 50/60Hz auto-determination
Critical Dv/dt with output deactivated 1000V/μsec
Held nominal voltage of on the impulse 4KV
Nominal current for short circuit condition 5KA
Protection
RC, extrarapid fuses for SCR
Rated current AC51
non-inductive or slightly inductive
loads, resistance furnaces
CFW 400
Nominal current 400Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 8000 A
I2t per fusione: 1.050.000A²s
CFW 500
Nominal current 500 Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 15.000 A
I2t per fusione: 320000 A²s
dV/dt critical: 1000V/μs
CFW 600
Nominal current 600Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 15.000 A
I²t for blowout: 1.125.000 A²s
NOTE (all models)
Minimum load controllable: 5 % of product current rated level.
Thermic Dissipation
CFW models dissipate thermic power based on load current:
Pdissipation = I_load_Arms * 1.3V (W)
For models with integrated fuse, also consider dissipated power at
rated current shown on the fuse table CFW models with electronic
fuse (with internal IGBT) dissipate thermic power based on load
current: Pdissipation = I_load_Arms * 2.8V (W)
Rated current AC56A permitted trigger
modes: ZC, BF con DT (Delay Trigger-
ing), PA with softstart
Derating: 20% of rated current value.