The GV7AS525 is a TeSys MX shunt trip — a voltage release that trips a GV5, GV6, or GV7 manual motor protector when control voltage is applied to its coil. It is the remote-trip accessory, not the main breaker. Rated for 525 V AC 50 Hz control circuits, it operates in under 50 ms per IEC 60947-1, which means it opens the protector fast enough to clear a fault before downstream damage escalates.
That covers standard 400/480 VAC panels with headroom. The control circuit accepts 0.7...1.1 Un, so a 525 V nominal coil holds in down to about 367 V and up to 577 V — useful if your control transformer sags under load. The threshold tripping voltage is 0.2...0.75 Ue, meaning the release drops out and trips the protector when the control voltage falls between roughly 105 V and 394 V (on a 525 V system). That wide dropout band makes it forgiving of brownout conditions, but verify your undervoltage protection coordination: if you need a tighter dropout, this is not the part.
Screw-clamp terminals accept 1 mm² solid, 1.5 mm² flexible without ferrule, or 1.5 mm² flexible with ferrule. Tightening torque is 1.2 N.m — a standard small screwdriver setting. The shunt trip mounts directly onto the left side of the GV5, GV6, or GV7 protector body; it does not occupy additional DIN rail space beyond the protector footprint. Inrush power is 10 VA AC, hold-in is 5 VA AC, so the control transformer must be sized for the inrush peak if multiple releases fire simultaneously.