.svg){kind=logo}
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:
- TeSys GV2
- TeSys GV3
- TeSys GV4
- TeSys GV7
- TeSys U
2) Explanation of the calculation of the maximum earth loop impedance
This also includes additional information about:
- Motor Rated devices
- Ambient Temperature
TeSys GV7 Range
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
