Voltage Protected Breaker

MT66

MT66 voltage protection breaker is designed for distributed grid-connected PV systems especially. The voltage protector circuit will switch opening with a certain delay time automatically when overvoltage or Undervoltage happens and reclose automatically when comes to normal. The voltage protection circuit breaker also has an external breaker with communication and remote control.

Specification Product pictures Data download

Features

Minimum Space Requirement: Small size, the control module is just 18mm

Muli-functions: Auto-opening in overvoltage, auto-closing in under voltage, auto-closing in no-voltage, auto-reclosing in normal voltage, and remote control

High action time: Closing time is less than 2 seconds, opening time is less than 0.6 seconds

Very Simple Installation: All devices are easily mounted in 35mm Rail

High Life: The mechanical life reaches 20000 times

High Current: There are two frames and the rated current is up to 125A

High Reliability: It is driven internally and simultaneously with complete reliability and long life

Easy Wiring: Power is supplied internally and the wiring connection is completely the same as traditional MCB.

Electrical Features
	Item Code	MT66-2P	MT66-4P
	Standards	IEC60898, GB10963.1
	Approvals	CCC, CE
	Rated Voltage Ue (Vac)	230	400
	Frame Currem Inm (A)	80,125
	Rated Current In (A)	40,50,63,80,100,125
	Rated Frequency (Hz)	50/60
	Rated Insulation Voltage Ui (Vac)	500
	Rated Impulse Withstand Voltage (1.2/50) Uimp (A)	2500
	Rated Breaking Capacity acc.to IEC60899 Icn (A)	6000
	Tripping Characteristic	C (5-10In)	D (10-14In)
	Pollution Degree	2
Mechnical Features
	Width (mm)	54	90
	Electrical Life (times)	20000
	Mechanical Life (times)	60000
	Protection Degree	IP20	IP40
	Reference Temperature for Setting of Thermal Elecment (℃)	30
	Ambient Temperature (℃)	-25---+55
	Storage Temperature (℃)	-40---+70
	Humidity (℃)	95%
Self-resetting Overvoltage and Undervoltage Protection
	Overvoltage Action Value	＞290V±10V
	Overvoltage Recovery Value	＜280V±10V
	Undervoltage Action Value	＜160V±10V
	Undervoltage Recovery Value	＞190V±10V
Installation
	Terminal Connection Type	Cable
	Terminal Size Top/Bottom for Cable (mm2)	1x25.2x25
	*Tightening Torque (Nm)**	4
	Mounting	On Din rail En60715(35mm) by means of fast clip device
	Connection	From top to bottom