JR28 series thermal overload relay (hereinafter referred to as “thermal relay”) is suitable for AC 50/60Hz AC motor running for long term or intermittently running for long term with working voltage of 690V and below and with current up to 93A for overload protection and open-phase protection.
Thermal relay can be spliced with the contactor, and can be installed separately
| Item | JR28-25 | JR28-36 | JR28-93 | ||
| Rated current | 25 | 36 | 93 | ||
| Rated insulation voltage V | 690 | 690 | 690 | ||
| Open-phase protection | Yes | Yes | Yes | ||
| Manual and auto reset | Yes | Yes | Yes | ||
| Temperature compensation | Yes | Yes | Yes | ||
| Trip indicator | Yes | Yes | Yes | ||
| Test button | Yes | Yes | Yes | ||
| Stop button | Yes | Yes | Yes | ||
| Installation method | Plug-in type, standalong type | Plug-in type, standalong type | Plug-in type, standalong type | ||
| Aux. contact | 1NO+1NC | 1NO+1NC | 1NO+1NC | ||
| AC-15 rated working current A | 220V | 1.64 | 1.64 | 1.64 | |
| 380V | 0.95 | 0.95 | 0.95 | ||
| Sectional area of wire mm2 | Main | Single-core or stranded wire | 1~4 | 6~10 | 6~35 |
| circuit | Wiring screw | M4 | M4 | M10 | |
| Aux. circuit | Single-core or stranded wire | 2×(0.5~1) | 2×(0.5~1) | 2×(0.5~1) | |
| Wiring screw | M3.5 | M3.5 | M3.5 | ||
Normal working conditions and installation conditions:
4.1 Ambient air temperature: -5℃~+40℃, the mean measured within 24h does not exceed 35℃. 4.2 Altitude: Not exceed 2,000 meters.
4.3 Relative humidity: The relative humidity does not exceed 50% at the maximum temperature +40℃, and a higher relative humidity is permissible at a lower temperature. The mean monthly minimum temperature of the wettest month does not exceed +25℃, and the mean monthly maximum relative humidity of this month does not exceed 90%. Special measures are taken for condensation occurred occasionally due to temperature changes.
4.4 Pollution degree: 3.
4.5 Installation conditions: The angle between the mounting surface and the vertical surface does not exceed ±5°.
4.6 It should be installed in places not full of water vapor with rain- and snow-proof device provided.
4.7 There is no obvious shaking, impact, or vibration.
4.8 There is no explosive and hazardous medium and the medium does not contain enough gas or conductive dust that can cause corrosion to the metal and damage to the insulation.
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Zhejiang Tengen Electric Co., Ltd.
Sulv Industrial Zone, Liushi Town, Yueqing City, Zhejiang Province, China, 325699
+86 21 3119 8727
marketing@tengen.com.cn
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