1. JSZJK-10Q voltage transformer is an indoor epoxy resin full vacuum casting structure. Its surface creepage distance is greater than 25.m/kV 2. When the JSZK1-10 and JSZK1-10F voltage transformers are used in the system, each of them has four casting bodies, and the inner part is three voltage casting bodies, which are sleeved on the three-phase core column, and the anti-resonance part is installed in another port. On the iron core, during normal operation, the neutral point-to-ground voltage is zero volts, and the secondary output voltage of the anti-resonance part is zero volts, and one is short-circuited to ground. The secondary side (da-dn) of the anti-resonance part generates a voltage of 100V, which drives the relay to act, and the neutral point of the power supply is cut off. Harmonic elimination measures are adopted, so that the product does not need additional protection methods such as harmonic elimination or damping grounding, that is, it can be safely It can operate on the power grid and can operate in a single-phase grounded fault line for a long time.