Low-voltage power distribution systems can be broadly divided into two categories:
1) Ungrounded systems (IT systems, DC systems);
2) Grounded systems (TT systems, TN systems).
Protection scheme for ungrounded systems: The system's ground fault is monitored by measuring the insulation resistance between the system and ground.
Grounding system protection scheme: The system monitors the residual current to ground to detect grounding faults.
4pcs main equipment:
1) AITR series medical isolation transformer;
2) AIM-M10 medical intelligent insulation monitor;
3) AKH-0.66P26 current transformer;
4) AID150 external alarm and display unit.
5pcs main equipment:
1) AITR series medical isolation transformer;
2) AIM-M300 medical intelligent insulation monitor;
3) AKH-0.66P26 current transformer;
4) AID150 external alarm and display unit;
5) HDR-60-24 instrument power supply.

6pcs main equipment:
1) AITR series medical isolation transformer;
2) AIM-M300/SG medical intelligent insulation monitor;
3) AKH-0.66P26 current transformer;
4) AID150 external alarm and display unit;
5) HDR-60-24 instrument power supply;
6) AIL160-6 insulation fault locator.
AITR Series Medical Isolation Transformers.
model | capacity (VA) | A(mm) | B(mm) | C(mm) | D(mm) | total weight (kg) |
AITR10000S | 10000 | 280 | 236 | 421 | 240 | 86±5 |
AITR8000S | 8000 | 280 | 236 | 421 | 240 | 79±5 |
AITR6300S | 6300 | 280 | 221 | 421 | 240 | 69±5 |
AITR5000S | 5000 | 280 | 211 | 421 | 240 | 62±5 |
AITR3150S | 3150 | 280 | 211 | 421 | 240 | 49±5 |

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