Industrial Automation

G3ZA

Multi-channel Power Controller

G3ZA

Optimum Cycle Control for High-precision Control with Low Noise

last update: December 22, 2021

Ratings

Load power supply voltage range	100 to 240 VAC	400 to 480 VAC
Power supply voltage	100 to 240 VAC (50/60 Hz)
Operating voltage range	85 to 264 VAC
Power consumption	16 VA max.
Load power supply voltage	100 to 240 VAC	400 to 480 VAC
Load power supply voltage range	75 to 264 VAC	340 to 528 VAC
Manipulated variable input	0.0% to 100.0% (via RS-485 communications)
*Current transformer input 1**	Single-phase AC, 0 to 50 A (primary current of CT) Single-phase AC, 0 to 150 A (primary current of CT)
Trigger output	One voltage output for each channel, 12 VDC ±15%, Max. load current: 21 mA (with built-in short-circuit protection circuit)
Alarm output	NPN open collector, one output Max. applicable voltage: 30 VDC, Max. load current: 50 mA Residual voltage: 1.5 V max., Leakage current: 0.4 mA max.
Indications	LED indicators
Control method	Optimum cycle control Soft-start optimum cycle control *2 Three-phase optimum cycle control
Ambient operating temperature	-10 to 55°C (with no icing or condensation)
Ambient operating humidity	25% to 85%
Storage temperature	-25 to 65°C (with no icing or condensation)
Elevation	2,000 m max.
Accessories	Instruction Sheet

*1. CT inputs are provided only on Models with heater burnout detection.
*2. Use an SSR without the zero-cross function (G3PA-[]BL-VD) for soft-start optimum cycle control. (Refer to G3PA for
details.)

Performance

Current indication accuracy	Current Range 0 to 50 A, ±3 A 0 to 150 A, ±9 A 0 to 100%, ±6% * (for models with heater burnout detection)
Insulation resistance	100 MΩ min. (at 500 VDC) between primary and secondary
Dielectric strength	2,000 VAC, 50/60 Hz for 1 min between primary and secondary
Vibration resistance	Vibration frequency: 10 to 55 Hz, acceleration: 50 m/s² in X, Y, and Z directions
Shock resistance	300 m/s² three times each in six directions along three axes
Weight	Approx. 200 g (including terminal cover)
Degree of protection	IP20
Memory protection	EEPROM (non-volatile memory) (number of writes: 100,000)
Installation environment	Overvoltage category II, pollution degree 2 (according to EN61010-2-201)
Approved standards	UL508 (Listing), CSA22.2 No. 14 EN61010-2-201

* When measured with percentage selected for the current monitor parameter and the maximum current measurable
with the CT at 100%.

Communications Specifications

Transmission line connections		Multipoint
Communications method		RS-485
	Max. transmission distance	500 m
	No. of nodes	31 (via multidrop connections)
Synchronization method		Stop-start synchronization
Communications baud rate		9.6, 19.2, 38.4 or 57.6 kbps, Default: 9.6 kbps
Transmission code		ASCII
Communications data length		7 or 8 bits, Default: 7
Communications stop bits		1 or 2 bits, Default: 2
Communications parity		Vertical parity: None, even, or odd, Default: Even
Flow control		None

Current Transformer Specifications (Order Separately)

Item	Specification
Model number	E54-CT1	E54-CT3	G3ZA-CT150L
Max. continuous heater current	50 A	120 A *	150 A
Detection current with G3ZA connected	50 A		150 A
Dielectric strength	1,000 VAC for 1 min		2,000 VAC for 1 min
Vibration resistance	98 m/s², 50 Hz
Weight	Approx. 11.5 g	Approx. 50 g	Approx. 130 g
Accessories	None	Connection terminals (2) Plugs (2)	None

* The maximum continuous current is 50 A for the G3ZA in combination with the E54-CT3.

last update: December 22, 2021

Product Category

Relays
- Power Controllers
  - G3PW
  - G3ZA

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