hager hw+ User Manual

48 6LE008146B
Protection functions
4.1 Long time delay protection against overcurrent
The sentinel Energy electronic trip unit protects against overcurrent and earth faults for all
types of electrical distribution in accordance with the requirements of standards IEC 60947-1
and 60947-2.
Protection system
- Long delay against overcurrent - L: Overload protection
- Short delay against overcurrent - S: Protection against low current short circuits
- Instantaneous against overcurrent - I: Protection against high current short circuits
- Earth fault - G: Earth fault protection
- Neutral - N: Protection against overloads and short circuits which may flow through and
damage the neutral conductors.
I (A)
t (s) LS I
tr
lrlg lilsd
tsd
tg
l²t
l²t
L
Ir Long time delay protection threshold against overcurrent
tr Long time delay against overcurrent
S
Isd Short time delay protection threshold against overcurrent
tsd Short time delay value
I²t ON/OFF
Short time delay protection I²t curve against overcurrent
(activated/deactivated)
I Ii Instantaneous protection threshold against overcurrent
G
Ig Earth protection threshold
tg Earth protection time delay
I²t ON/OFF Earth protection I²t curve (activated/deactivated)
N N
Threshold as % of the value of the neutral protection setting
(adjustment of the Ir and lsd thresholds)
Protection according to IEC Protection according to ANSI
L ANSI 49
S ANSI 50TD/51
I ANSI 50
G ANSI 50N TD/51N
In addition to Instantaneous overcurrent protection, the Energy trip units include MCR
protection (Making Current Release). This guarantees immediate tripping of the hw+ circuit
breakers in cases of closing operation on a short-circuit.
Protection setting adjustment device
The protection settings are adjustable from the PROTECTION menu of the sentinel Energy
display or the panel display or the Hager Power setup software. All protection functions are
based on the root-mean-square value (RMS) of the current to take into account the presence
of current harmonics. The expanded range of protection curve settings facilitates coordination
in terms of selectivity.

hager hw+ Specifications

General

Brand	hager
Model	hw+
Category	Circuit breakers
Language	English