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What is the maximum earth fault loop impedance Zs for the TeSys GV7?
Note: The GV7 range of breakers is no longer produced, this FAQ is for maintenance purposes only.
For information regarding possible alternatives please visit the Product Substitution tool on our website: https://www.se.com/uk/en/product-substitution/
The charts below detail the Earth Loop impedance (Zs) for the GV7 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) Zs charts of TeSys motor protection circuit breakers:
This also includes additional information about:
Please refer to the charts below that detail the maximum earth loop impedance Zs for 0.4s disconnection time with Uo 230V
For information regarding possible alternatives please visit the Product Substitution tool on our website: https://www.se.com/uk/en/product-substitution/
The charts below detail the Earth Loop impedance (Zs) for the GV7 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) 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
| GV7 | ||||
| Reference | Thermal Adjustment Range In | Magnetic Tripping Current Im | Tolerance Im+20% | Maximum Loop Impedance Zs |
| (A) | (A) | (A) | (Ω) | |
| GV7RE150 | 90 .. 150 | 2520 | 0.09 | |
| GV7RS150 | 90 .. 150 | |||
| GV7RE220 | 132 .. 220 | 3696 | 0.06 | |
| GV7RS220 | 132 .. 220 | |||
Released for:Schneider Electric UK
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