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Acrel
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Acrel
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ON
ERROR
WARNING
ALARM
COMM
TEST/ESC
MENU/
AIM-T500
Front view vertical view
The above diagram is the rear view, side view and front view of the AIM-T500 insulation
monitoring device of the embedded installation in succession.
6.2 Method of installation
The AIM-T500 insulation monitor adopts embedded installation, and the above diagram is the hole
dimensional drawing of the insulation monitor.
6.3 Wiring method
Upper terminals: T1, T2 (31, 32) are self-check terminals. They can judge whether the measurement
of the resistance of the instrument is accurate. This function must be used without access to the DC
system. Short connection with T1 and T2 will display instrument measurement results. F1, F2 (23, 24)
are interconnected terminals, when two ungrounded systems are interconnected. The instruments that
have access to F1 and F2 will stop working, and it will be monitored separately by another instrument.
AK (9) is an extension terminal, used for insulation monitoring of IT systems above AC690/DC800V,
see ACPD series manual for details. L1, L2 (4, 5) are connected to the monitored IT system (No three-
phase neutral phase IT system can be connected to any 2 phase; When a three-phase IT system with
neutral lines is connected, both L1 and L2 are connected to the neutral line; When the single-phase DC
system is connected, the L1 is connected to the positive stage and the L2 is connected to the negative
pole).
31
T1
32
T2
23
F1 F2
24 9
AK
5
L2
4
L1
Lower terminal: KE, PE (28, 29) are instrument functional grounding lines. They need to be
separately connected to the field equipotential grounding terminal. The terminals of U1 and U2 (1, 2)
