Thytronic NG10 User Manual

FUNCTION CHARACTERISTICS
42
NG10 - Manual - 04 - 2022
4.4 PROTECTIVE ELEMENTS
Rated values
Inside the Base menu the following parameters can be set:
• Relay reference name.
• Relay nominal currents (phase and residual), to which the regulation are related.
• Primary nominal values, employed for measures relative to primary values.
• Measurements reading mode.
• Language.
Information for settings:
• Relay reference name.
Alphanumeric mnemonic string (max 16 characters) useful for identification of protected plant.
• Relay nominal frequency f
n
This nominal value must be set same as the frequency of the grid.
Example: grid frequency f
n
= 50 Hz
Relay nominal frequency f
n
= 50 Hz
• Relay phase nominal current - side H and side L (I
nH
and I
nL
)
This nominal value must be set by means dip-switch to 1 A or 5 A, same as the secondary CTs
nominal current.
Dip-switches are located on board of the CPU module; the exhaustive treatment of Dip setup is
described in the “6.5 SETTING NOMINAL CURRENTS I
n
AND I
En
” paragraph.
• Rated primary phase current chosen as reference (I
nref
)
CT’s primary current chosen by relay for amplitude compensation.
• Side reference for compensation (RefSide)
Choice of the reference side for the phase compensation currents.
• Current matching type (MatchType)
Setting the current compensation type (INT-internal, EXT-external CTs)
• Protected object (ProtObj)
Setting the type of protecting object (fixed to GEN-MOT-LINE-BAR)
• Rated current of the protected object (I
ng
)
This nominal value must be set to the protected object nominal current.
• Relay residual current (I
En
)
This nominal value must be set by means dip-switch to 1 A or 5 A, same as the secondary CT nomi-
nal current.
Dip-switch is located on board of the CPU module; the exhaustive treatment of Dip setup is de-
scribed in the “6.5 SETTING NOMINAL CURRENTS I
n
AND I
En
” paragraph.
• Phase CT primary currents - side H and side L (I
npH
and I
npL
)
These parameters affect the measure of the phase currents when the primary measurement read-
ing mode is selected. It must be programmed to the same value of the phase CT primary nominal
current.
Example
The phase CT primary currents I
npH
and I
npL
must be set as: I
npH
= I
npL
= 500 A
• Residual CT primary current (I
Enp
)
These parameters affect the measure of the residual currents when the primary measurement
reading mode is selected. They must be programmed to the same value of the residual CT(s) pri-
mary nominal currents
Es-In.ai
K
TA
= 500A/5A=100
K
TA
= 500A/5A=100
NG10
side H
side L
52
G
I
nH
= 5 A
I
nL
= 5 A

Thytronic NG10 Specifications

General

Brand	Thytronic
Model	NG10
Category	Protection Device
Language	English