ETU1 Series Surge Protective Device

Description

The ETU1 series surge protectors are indor-mounted, single-port vltage switching surge arresters designed for AC 50/0 Hz, with a rated voltage of 230/480Vor lower,incuding T, I, TN-S, TN-C, and TN-CS power supply systems They are designed to protect low-voltage power grids, various electricalequipment,and control systems by suppresing transient overvoltages exceeding the equipment’ s withstand votage, dissipating surge energy, and limiting various surgeovervoltages to safeguard system circuits and equipment.Product compliance standards: GB/T 18802.1, GB/T 18802.12, IEC 61643-1, IEC 61643-21, UL 1449 ed. 2

Operating and Installation Conditions

Ambient air temperature	Normal range: Not higher than +40°C, not lower than -5°C; Extended range: Not higher than +80°C, not lower than -40°C
Altitude	The installation site is located at an altitude of no more than 3,000 meters
Humidity	30%–90% at room temperature
Pollution Level	Level 3
Installation Requirements	In media that do not pose an explosion hazard and contain no gases or dust (including conductive dust) capable of corroding metals or damaging insulation

Main Technical Specifications

Item Parameters Grade Specifications	ETU1
Poles	1P、2P、1P+N、3P、4P、3P+N
Continuous operating voltage Uc (V)	220/690
Rated discharge current limp (10/350 µs) kA	12.5	15	25	50
Upstream circuit breaker (A)	125	125	160	160
Protection rating	IP20	IP20	IP20	IP20
Voltage Protection Level UP (kV)	<2.5	<2.5	<2.5	<2.5
Response time (ns)	<25
Wire capacity (mm²)	16-35	16-35	16-35	16-35
Humidity range	-40~+85	-40~+85	-40~+85	-40~+85
Altitude (m)	3000	3000	3000	3000
Relative humidity	<95%	<95%	<95%	<95%

Model and Specifications

ET9-D 5-10KA-420V(In=5kA,Imax=10KA,8/20us)

ET9-D 10-20KA-420V(In=10kA,Imax=20KA,8/20us)

ET9-C 20-40KA-420V(In=20kA,Imax=40KA,8/20us)

ET9-C 30-60KA-420V(In=30kA,Imax=60KA,8/20us)

ET9-B 40-80KA-420V(In=40kA,Imax=80KA,8/20us)

ET9-B 60-100KA-420V(In=60kA,Imax=100KA,8/20us) (Complies with State Grid residential distribution project requirements; for use in capacitor cabinets)

ETU1-12.5KA-420V limp=12.5KA(10/350us) (Complies with State Grid engineering requirements; for use in JP cabinets)

ETU1-15KA-420V limp=15KA(10/350us) In=100KA

ETU1-25KA-420V limp=25KA(10/350us) In=120KA (Complies with State Grid residential distribution project requirements; for use in the main incoming switchgear)