Bender AGH520S Coupler
Product description
The coupling device AGH520S is designed to extend the nominal
voltage range of the ISOMETER® iso685… series and IRDH275-4…/
IRDH375-4…/IR470LY-40/IR420-D6/IRDH1065B-4 to (3)AC 0…7200 V,
50…400 Hz. The coupling device is connected to the system to be
monitored by one pole and connected to the terminal AK of the
ISOMETER® by means of the terminal 5.
Technical data
Insulation coordination acc. to IEC 61800-5-1
Operating voltage ：AC 6.3 kV
Voltage test according to IEC 61800-5-1
Overvoltage category/impulse voltage test (basic insulation)： III /AC 35 kV
AC voltage test (basic insulation) ：AC 17.5 kV
Partial discharge test ：12 kV
Voltage ranges
Nominal system voltage Un： AC, 3(N)AC 0…7.2 kV
Nominal system voltage Un for UL applications： AC, 3(N)AC 0…6 kV
Nominal frequency fn： 50…400 Hz
Internal DC resistance Ri ：≥ 80 kΩ
Impedance Zi at 7.2 kV and 50 Hz ：≥ 6 MΩ
Environmental conditions
Classification of mechanical conditions acc. to IEC 60721:
Stationary use (IEC 60721-3-3) 3M4
Transport (IEC 60721-3-2)： 2M2
Storage (IEC 60721-3-1) ：1M3
Ambient temperature (during operation)： -10…+55 °C
Ambient temperature for UL applications (during operation) ：-10…+45 °C
Ambient temperature (during storage) ：-20…+70 °C
Climatic class acc. to IEC 60721-：3-3 3K5 (except condensation and formation of ice)
Connection
Connection terminal 2 (medium voltage) screw-type terminal
Connection terminals 3, 4, 5 screw-type terminals
Connection properties
rigid/flexible 0.2…4 mm²/ 0.2…2.5 mm² (AWG 24…12)
Tightening torque 2.9 Nm
General data
components (DIN EN 60529)： IP64
Degree of protection, terminals (DIN EN 60529) ：IP20
Type of enclosure： resin-encapsulated block
Screw mounting ：4 x M5
Flammability class ：UL94 HB
Weight： ≤ 4500 g