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What is the operating time of ground fault protection devices defined in the UL 1053 standard?
The UL 1053 standard defines in Table 22.1 the operating time of the ground fault protection devices:
| Ground-fault current (A) | Time (s) |
| 85% of pickup current | Shall not trip |
| 115% of pickup current | Ultimately |
| 150% of pickup current | 2 |
| 250% of pickup current | 1 |
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