ETZM High Voltage Molded Case Circuit Breaker

Scope of Application

The ETEM Series High Voltage Molded Case Circuit Breaker (hereinafter referred to as the Circuit Breaker) is suitable for distribution network circuits with AC 50Hz, rated insulation voltage 1140V, rated working volatge 1140V, and rated working current from6A to 800A. It’ s used to distribute electricity and protect circuits and power equipmentfrom overload, short circuit, undervoltage, and other faults. It can also protect motorsagainst infrequent starting, overload, short circuit, and undervoltage. This Circuit Breakerfeatures, among others, small size, high breaking, and short flashover, making it anideal product for users. The Circuit Breaker can be installed either vertically (i.e. verticalinstallation) or horizontally (horizontal installation). The wiring method is optional forfront panel wiring, rear panel wiring, or plug-in wiring.

Working Environment

• The upper limit value of ambient air temperature shall not exceed +40 °C, and its lowerlimit value shall not be less than -5 °C;
• Pollution level: 3;
• Protection rating: IP20;
• The altitude of the installation site should not exceed 2,000m;
• The RH of the atmosphere should not exceed 50% at the highest ambient temperature of+40 °C. At lower temperatures, there can be higher Rh, such as 90% at 20 °C. Necessarymeasures should be taken in consideration of the condensation that occurs on theproduct due to temperature changes.

Electrical Technical Parameters

Basic Parameters of Thermal Magnetic / Leakage Type

Model		ETZM-250		ETZM-320
Frame Rating Current (A)		250		320
Rated Current ln(A)		63、100、125、160 180、200、225、250		250、315、320
Number of Poles		3
Rated Insulation Voltage Ui (V)		AC1150
Rated Working Voltage Ue (V)		AC800V	AC1140V	AC800V	AC1140V
Rated Impulse Withstand Voltage Uimp (V)		8000		8000
Flashover Distance (mm)		0		0
Limit Short Circuit Breaking Capacity lcu (kA)	M	36.5	15	36.5	15
	H	50	15	50	15
Operating Short Circuit Breaking Capacity lcs (kA)	M	36.5	15	36.5	15
	H	50	15	50	15
Leakage Operating Current I△n (mA)		—	—	—	—
Leakage Non-operating Current I△n (mA)		—	—	—	—
Mechanical/ Electrical Life (Operations)	Power on	10000
	Power of	10000

ETZM-400			ETZM-630		ETZM-800
400			630		800
315、320、350、400			400、500、630		400、500、630、800
AC800V	AC1140V		AC800V	AC1140V	AC800V	AC1140V
12000			12000		12000
0			0		0
H	36.5	10	36.5	10	36.5	10
R	50	15	50	15	50	15
H	36.5	10	36.5	10	36.5	10
R	50	15	50	15	50	15
—		—	—	—	—	—
—		—	—	—	—	—
10000
10000

Attachment Type

Attachment Name Attachment Code	No Attachments	Alarm Contact	Shunt Tripper	Auxiliary Contact	Undervoltage Tripper	Auxiliary Contact of Shunt Tripper	Tripper Contact of Shunt Tripper	Two Sets of Auxiliary Contacts
Electromagnetic Tripper	200	208	210	220	230	240	250	260
Duplex Tripper	300	308	310	320	330	340	350	360

Attachment Name Attachment Code	No Attachments	Alarm Contact	Shunt Tripper	Auxiliary Contact	Undervoltage Tripper	Auxiliary Contact of Shunt Tripper	Tripper Contact of Shunt Tripper	Two Sets of Auxiliary Contacts
Electromagnetic Tripper	370	218	228	238	248	240	268	278
Duplex Tripper	270	218	228	238	248	340	268	278