Nidec LSA 52.3 - Upon Request; NEMA; Insulation Distances; Added Products in the Terminal Box

Electric Power Generation
Installation and maintenance
5382 en - 2022.11 / h
LSA 52.3 / LSA 53.2 / LSA 54.2
Industrial Range Alternators
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14
3.4.1.2 Upon request; NEMA
An arrow located on the front bearing indicates the
direction of rotation.
In the terminal box a specific marking plate indicates the
specific generator phase sequence.
Counter clockwise rotation
viewed from the stator
connection (NEMA)
(Clockwise rotation viewed
from the shaft drive end
following IEC)
Clockwise rotation viewed
from the stator connection
(NEMA)
(Counter clockwise
rotation viewed from the
shaft drive end following
IEC)
The cables are marked:
U1, V1, W1.
The terminals are marked:
T3, T2, T1
The cables are marked:
U1, V1, W1.
The terminals are marked:
T3, T2, T1
The installer connects the
following:
L1 --> (U1) T3
L2 --> (V1) T2
L3 --> (W1) T1
The installer connects the
following:
L3 --> (U1) T3
L2 --> (V1) T2
L1 --> (W1) T1
3.4.2 Insulation distances
Products not delivered by Leroy-Somer and then installed
in the terminal box must meet the electrical insulating
distances.
This applies to power cables and lugs, and to added
transformers, etc.
Nominal Voltage 500 V 1 KV 2 KV 3 KV
Phase-Phase in
the air (mm)
25 30 40 60
Phase-Earth in the
air (mm)
25 30 40 60
Phase-Phase
Creeping (mm)
25 30 40 70
Phase-Earth
Creeping (mm)
25 30 40 70
Nominal Voltage 5 KV 7.5KV
12.5KV
15 KV
Phase-Phase in
the air (mm)
120 180 190 190
Phase-Earth in the
air (mm)
90 120 125 125
Phase-Phase
Creeping (mm)
120 180 190 190
Phase-Earth
Creeping (mm)
120 180 190 190
3.4.3 Added products in the terminal box
This may apply to site added customer CTs; VTs etc.
Leroy-Somer must be informed if some appliances have to
be installed in the generator terminal box.
The products not delivered by Leroy-Somer and then
installed in the terminal box must meet the electrical
insulating distances. Refer to chapter 3.4.2.
The installed appliances must be able to withstand
vibration.
T6
T5
T4
T3
T2
T1
L1
L2
L3
U1
V1
W1
T6
T5
T4
T3
T2
T1
L3
L2
L1
U1
V1
W1