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current transformer abb power consulting leak check wika

1ZSC000562-AAD en Accessories and protection devices ... - ABB· PDF fileABB on-load tap-changers are supplied with a pressure relay as standard. If connected cor-rectly, the pressure relay trips the transformer main circuit breakers in the event of overpres-sure inside the OLTC. It is recommended to connect the pressure relay in the trip circuit of the power supply during testing of the transformer. Fig. 8 ...

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