hager hw+ User Manual

496LE008146B
Protection functions
4.1 Long time delay protection against overcurrent
The Long time delay protection is designed to protect the cables, the busbars and the busbar
trunking from current overloads. It includes a thermal memory function that temporarily stores
the calculated thermal values so that the thermal eect of the cable heating remains available.
The phases and the neutral pole benefit independently from the Long time delay protection.
It can also be used to protect transformers or generators.
Long time delay protection curve
I (A)
t (s) L
tr
lr 6xlr
Long time delay protection
Parameters
L
Ir= 0.40 to 1.00 x
In (A)
Long time delay protection threshold against overcurrent
tr (s) = 0.5 to 25
in increments
of 0.5
Long time delay
Curve
Tripping curve. Thi by default, to be used for Long time delay
protection in accordance with IEC 60974-2.
The Long time delay protection is adjusted from the PROTECTION LONG TIME menu of the
sentinel Energy display, the panel display or the Hager Power setup software.
Adjusting the lr threshold
Rating (In)
Threshold adjustment
range
Ir = 0.40 to 1.00 x In (A)
Rating (In)
Threshold adjustment
range
Ir = 0.40 to 1.00 x In (A)
400 A 160 - 400 A 1600 A 640 - 1600 A
630 A 252 - 630 A 2000 A 800 to 2000 A
800 A 320 - 800 A 2500 A 1000 to 2500 A
1000 A 400 - 1000 A 3200 A 1280 to 3200 A
1250 A 500 - 1250 A 4000 A 1600 to 4000 A
The Long time delay protection triggers between 1.05 and 1.20 x Ir.
Adjusting the tr time delay
The tr time delay defines the tripping time of the Long time delay overcurrent protection for a
current of 6 x Ir.
tr adjustment range
tr (s) = 0.5 to 25 s in increments of 0.5

hager hw+ Specifications

General

Brand	hager
Model	hw+
Category	Circuit breakers
Language	English