VOLTAGE SURGE ARRESTERS FOR DC FLOATING OR EARTHED POWER SUPPLIES & SYSTEMS

Product

group

HH

PROTEC DMDR 20

Features

  • Type 3
  • Wired in parallel
  • Suitable for floating or Earthed DC systems
  • Suitable for power supply and telecommunication applications
  • No fusing required
  • Flag indication
  • Remote contact
Download data sheet

Modular voltage surge arrester 8/20 conforming to the latest IEC / EN standards Class III (Type 3), to protect against the effects of indirect lightning strikes and the resultant induced voltages.

The units are suitable for both DC floating or Earthed systems and are wired in parallel and the need of fusing is not required. These units are particularly suitable for DC power supply protection and telecommunication applications.

The unit has a front mechanically driven flag indicator per pole, green for healthy and red for fault, plus a mechanically driven auxiliary N/C contact. In a healthy state the contact is made, In the event of the MOV’s failing due to an intense or multiple surges the contact will change state to open (also indicated by the red flag). In this state protection has been lost, the unit will need replacing.

Complies with:
IEC61643-1:2005
EN61643-11:2005

Category: Class III / Type 3

Protection via: High energy MOV’s (Metal Oxide Varistors) & GDT (Gas Discharge Tube)

Response time floating system: <25n Sec

Response time Earthed system: <100n Sec

Thermal protection: Yes

Operating temperature range: -40°C to +80°C

Terminal cross section: 6mm² stranded cable

Module size: 1 (18mm)

Remote contact: Yes

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Type

PROTEC DMDR 20/24V (510 783)
PROTEC DMDR 20/48V (510 833)
PROTEC DMDR 20/60V (510 834)
PROTEC DMDR 20/120V (510 835)

Spare Modules

24VDC (510 784)
48VDC (510 836)
60VDC (510 837)
120VDC (510 838)

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