The means of isolation should therefore be installed in
the connection to the ESP unit.
Figures 8 & 9
show
example connection schematics. Where it is also
necessary to fuse the connection to the ESP unit (
see 3.7
Fuse connecting leads
) this can be achieved through use
of a switchfuse, MCCB or type ’C’ MCB.
3.7 Fuse connecting leads
The connecting leads to the phase/live terminals of the
ESP units should be fused. This is to protect the
Installation instructions for mains wire-in protectors | 3/10
NO
Volt free contact
ESP
240 M1
STATUS INDICATION
ELECTRONIC SYSTEMS
PROTECTION
Made by W J Furse & Co Ltd, ESP Division,
Wilford Road, Nottingham, NG2 1EB, UK
L
L N
N
WARNING
PATENT
APPLIED
FOR
If lit / flashing disconnect
unit & check Neutral to
Earth supply voltage
NC
C
GREEN
FULL PROTECTION
NO PROTECTION
REDUCED PROTECTION
(replace unit)
GREEN & RED
RED
Let-through voltage
600V
1 phase/50Hz
(Live to Neutral, Live to Earth & Neutral to Earth)
Vmax 280Vrms
Figure 10:
Busbar mounted HRC
fuse at the end of the
live connecting lead.
NO
Volt free contact
ESP
240 M1
STATUS INDICATION
ELECTRONIC SYSTEMS
PROTECTION
Made by W J Furse & Co Ltd, ESP Division,
Wilford Road, Nottingham, NG2 1EB, UK
L
L N
L
1
N
N
WARNING
PATENT
APPLIED
FOR
If lit / flashing disconnect
unit & check Neutral to
Earth supply voltage
NC C
GREEN
FULL PROTECTION
NO PROTECTION
REDUCED PROTECTION
(replace unit)
GREEN & RED
RED
Let-through voltage
600V
1 phase/50Hz
(Live to Neutral, Live to Earth & Neutral to Earth)
Vmax 280Vrms
