DCL-flyer0 pages

T R I P & L O C K - O U T R E L AY
Introduction
Output contacts
The DCL represents a new generation of high speed electro-mechanical tripping relays for power utility protection and control
applications.
Application of the DCL multi-contact high-speed trip relays
ensures fast operation of less than 8 ms with minimal contact
bounce.
8 N/O make (M) contacts plus 4 N/C break (B) contacts
Alternative contact arrangements from 2M+10B to 10M+2B can
be specied according the coding table.
Protective functions
86
Lock-out
Application
Construction
The effect of a fault on a power system is dependent on the
speed with which the fault can be detected and isolated.
Modern protection schemes incorporate ever increasing functionality through the application of digital techniques to protection relay technology. The requirement for highly reliable tripping and control relay elements does however remain and often
constitutes a signicant cost and space requirement when considering protection panel designs.
The DCL system fulls this need by providing a compact, exible
and high performance solution, while at the same time reducing
the cost and lead times normally associated with this class of
device.
A wide voltage operating range and user selectable low or high
burden tripping relay operation reduces the number of model
variations.
The DCL relay contacts can be specied to reset in a number
of ways:
Self reset contacts
All contacts operate when a voltage in the specied range
is applied to the relay coil and reset when this voltage is removed.
Latching contacts - Hand reset
• Hand Reset
All contacts operate and mechanically latch when a voltage in
the specied range is applied to the relay coil and reset when
the reset button located on the front of the relay is pressed.
• Electrical and Hand Reset
All contacts operate and mechanically latch when a voltage in
the specied range is applied to the relay coil and reset when
the reset button located on the front of the relay is pressed. A
voltage applied to the reset coil may also be used to reset the
contacts.
• Electrical Reset
All contacts operate and mechanically latch when a voltage in
the specied range is applied to the relay coil and reset when a
voltage applied to the reset coil.
The DCL range is packaged in a draw out case system and can be
either ush panel or rack mounted; it represents a new generation of electro-mechanical relays designed specically for application where high performance and reliability is paramount.
While the fundamental and proven electro-mechanical mechanism has been maintained, the implementation of modern manufacturing techniques combined with an innovative architecture
has provided a very exible and competitive alternative to older
generation auxiliary relays.
The outer case is manufactured from zinc coated mild steel providing considerable strength and long term durability. The entire
case surface is powder coated to provide corrosion protection
and an attractive textured nish. Relay elements are mounted on
fabricated berglass and acetal components to provide reliable
electrical isolation and simple cost effective construction.
DCL - Flyer - 08 - 2011