Siemens SIPROTEC 7UT635*-* N series User Manual

2 Functions
218
7UT613/63x Manual
C53000-G1176-C160-2
heatup time of the object to be protected. There is the following connection between
the asymmetrical factor K and the cool-down time:
Example:
For asymmetry factor K = 20 s and a permanently permissible asymmetrical load of
I
2
/I
N
= 11 % a corresponding cool-down time is derived
This value does not depend on whether the respective values were set to secondary
values, as the current transformation ratios are reduced in numerator and denomina-
tor.
The I
2
>> stage can additionally be set as reserve stage for network faults, as de-
scribed above (margin heading „Definite Time StagesI
2
>>, I
2
>(O/C)“).
Note
The following applies to the parameter overview:
The current values I/I
NS
refer to the rated current of the side to be protected of the main
protected object.
2.8.3 Settings
The table indicates region-specific presettings. Column C (configuration) indicates the
corresponding secondary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
4001 UNBALANCE LOAD OFF
ON
Block relay
OFF Unbalance Load (Negative
Sequence)
4011 I2>> 1A 0.10 .. 3.00 A; ∞ 0.50 A I2>> Pickup
5A 0.50 .. 15.00 A; ∞ 2.50 A
4012 I2>> 0.10 .. 3.00 I/InS; ∞ 0.50 I/InS I2>> Pickup
4013 T I2>> 0.00 .. 60.00 sec; ∞ 1.50 sec T I2>> Time Delay
4014 I2> 1A 0.10 .. 3.00 A; ∞ 0.10 A I2> Pickup
5A 0.50 .. 15.00 A; ∞ 0.50 A
4015 I2> 0.10 .. 3.00 I/InS; ∞ 0.10 I/InS I2> Pickup
4016 T I2> 0.00 .. 60.00 sec; ∞ 1.50 sec T I2> Time Delay
4021 I2p 1A 0.10 .. 2.00 A 0.90 A I2p Pickup
5A 0.50 .. 10.00 A 4.50 A
4022 I2p 0.10 .. 2.00 I/InS 0.90 I/InS I2p Pickup
4023 T I2p 0.05 .. 3.20 sec; ∞ 0.50 sec T I2p Time Dial

Siemens SIPROTEC 7UT635*-* N series Specifications

General

Brand	Siemens
Model	SIPROTEC 7UT635*-* N series
Category	Protection Device
Language	English