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G3ZA
Optimum Cycle Control for High-precision Control with Low Noise
Data Sheet (851KB)
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Ratings and Specifications
| 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 (See note 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 (See note 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 | ||
Note:
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.)
Performance
| Current indication accuracy | Current Range 0 to 50 A, ±3 A 0 to 150 A, ±9 A 0 to 100%, ±6% (See note.) (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 III, pollution degree 2 (according to IEC 60664-1) |
| Approved standards | UL508 (Listing), CSA22.2 No. 14 EN50178 EN61000-6-4 (EN55011: 1998, A1: 1999 Class A, Group 1) EN61000-6-2: 2001 |
Note: 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
(Optional)
| Item | Specification | ||
| Model number | E54-CT1 | E54-CT3 | G3ZA-CT150L |
| Max. continuous heater current | 50 A | 120 A (See note.) | 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 |
Note: The maximum continuous current is 50 A for the G3ZA in combination with the E54-CT3.
Caution: In the interenst of product improvement, specifications are subject to change without notice.
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