Bender IR470LY2-60

The ISOMETER®s of the IR470LY series monitor the insulation resistance of unearthed AC

and three-phase systems (IT systems) AC/3(N)AC 0…793 V. The device series is particularly suitable for systems requiring a high insulation level. The device can also be used for

monitoring de-energised loads. Two separately adjustable response values and alarm relays allow to distinguish between prewarning and alarm. In combination with a coupling

device the device series can be used for higher voltages.

The systems to be monitored should not contain DC components. Due to the measuring

method, insulation faults downstream of directly connected rectifiers are indicated with

increased response sensitivity. The set response values apply to the pure AC system only.

 Insulation monitoring for unearthed

AC, 3(N)AC systems 0…793 V

• Off-line monitoring for TN, TT and

IT systems 0…793 V

• Nominal voltage extendable via coupling

device

• Operating mode selectable: Insulation

monitoring/off-line monitoring

• Two separately adjustable response

values 100 kΩ…1 MΩ/500 kΩ…5 MΩ

• Connection monitoring system/earth

• Power ON LED, Alarm LED for signalling

AC, L+, L- insulation faults

• LED bar graph indicator for the indication

of the insulation resistance

• Connection for external kΩ indication

• Combined test and reset button

• Two separate alarm relays with one

potential-free changeover contact each

• N/O or N/C operation

• Fault memory behaviour, selectable

• AC, 3(N)AC main circuits (without directly connected rectifiers), such as motors, pumps,

rolling mills without variable-speed drives, air cooling and air conditioning systems,

lighting systems, heating systems, mobile generators, building services, domestic electrical

installation practice, etc.

• De-energised loads, such as fire extinguisher pumps, slide-valve drives (gas, water, oil etc.),

flue gas valves, cranes

Function

When the insulation resistance between the system conductors and earth falls below the

set response value, the alarm relays switch and the alarm LEDs light up. In case of interruption of the system or earth connection, the alarm LEDs flash. The measured value is

indicated on the LED bar graph indicator or a measuring instrument that can be connected

externally. In this way any changes, for example when circuits are connected to the system,

can be recognised easily. The fault messages can be stored. The fault memory can be reset 

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Related products:

Related products:

E-mail: alex@fenoux.com

Tel.: +86 13338369201

Skype: +86  13338369201

WhatsApp: +86  13338369201