The charts below detail the Earth Loop impedance (Zs) for the GV3 range of Motor Protection Circuit Breakers (MPCB) for any TN system based on the British Standard BS7671:2008+A3:2015
Two documents are also attached:
1) Sheet with Zs charts of Tesys motor protection circuit breakers:
Please refer to the charts below that detail the maximum earth loop impedance Zs for 0.4s disconnection time with Uo 230V
Two documents are also attached:
1) Sheet with Zs charts of Tesys motor protection circuit breakers:
- Tesys GV2
- Tesys GV3
- Tesys GV4
- Tesys GV7
- Tesys U
This also includes additional information about:
- Motor Rated devices
- Ambient Temperature
Please refer to the charts below that detail the maximum earth loop impedance Zs for 0.4s disconnection time with Uo 230V
| GV3L | ||||
| Reference | Thermal Adjustment Range In | Magnetic Tripping Current Im | Tolerance Im+20% | Maximum Loop Impedance Zs |
| (A) | (A) | (A) | (Ω) | |
| GV3L25 | 25 | 350.0 | 420.0 | 0.52 |
| GV3L32 | 32 | 448 | 538 | 0.41 |
| GV3L40 | 40 | 560 | 672 | 0.33 |
| GV3L50 | 50 | 700 | 840 | 0.26 |
| GV3L65 | 65 | 910 | 1092 | 0.20 |
| GV3L73 | 73 | 1120 | 1344 | 0.16 |
| GV3L80 | 80 | 1100 | 1320 | 0.17 |
| GV3P | ||||
| Reference | Thermal Adjustment Range In | Magnetic Tripping Current Im | Tolerance Im+20% | Maximum Loop Impedance Zs |
| (A) | (A) | (A) | (Ω) | |
| GV3P13 | 9 .. 13 | 182 | 218.4 | 1.00 |
| GV3P18 | 12 .. 18 | 252 | 302.4 | 0.72 |
| GV3P25 | 17 .. 25 | 350 | 420.0 | 0.52 |
| GV3P32 | 23 .. 32 | 448 | 538 | 0.41 |
| GV3P40 | 30 .. 40 | 560 | 672 | 0.33 |
| GV3P50 | 37 .. 50 | 700 | 840 | 0.26 |
| GV3P65 | 48 .. 65 | 910 | 1092 | 0.20 |
| GV3P73 | 62 .. 73 | 1120 | 1344 | 0.16 |
| GV3P80 | 70 .. 80 | 1120 | 1344 | 0.16 |
Released for: Schneider Electric Ireland
