ABB Tmax T8 L3692, Инструкция по установке и обслуживанию, Страница: 12 / 39

L3692
Tmax T8
12/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
8. Maintenance
8.1. Warnings
WARNING: before proceeding with any maintenance operation, it is obligatory to:
- Oen the circuit-breaker and make sure that the springs of the operating mechanism are unloaded;
- if work must be performed on fi xed circuit-breakers or on fi xed parts, disconnect the power supply to the power
circuit and auxiliary circuits and visibly earth the terminals on both the supply side and load side;
- Set the equipment to safe conditions as established by the standards and laws in force.
WARNING RISK OF ELECTRIC SHOCK: Risk of electric shock or accident.
ABB declines all liability for damage to persons or property caused by failure to comply with the instructions in this document.
The maintenance operations must be performed by skilled personnel with detailed knowledge of the equipment.
8.2. Maintenance program
8.2.1. Circuit-breaker life
When regular maintenance is performed, SACE Emax circuit-breakers - with or without shunt opening or shunt closing devices
- can withstand the following operating cycles without replacement of parts.
(1)
Rated uninterrupted
current
Mechanical life (2) Electrical life (2)
Iu (40 °C)
[A] N° of
operations
x 1000
Frequency
operations/
hour
415 V ~
N° of operations x 1000
Frequency
operations/hour
T8 (UL) 1600 15 60 4,5 30
T8 2000 15 60 4,5 30
T8 2500 15 60 4 30
T8 (UL) 3000 15 60 3 30
T8 (IEC) 3200 15 60 3 30
(1) These data refer to the standard installation in accordance with the product standards. Ask ABB Sace if different applications are involved.
(2)
Extreme weather conditions, polluted atmosphere or vibrations can reduce the life of the application. Ask ABB Sace.
8.2.2. Maintenance program
We hereby include the table indicating the frequency with which maintenance should be carried out and the relative routine
maintenance operations required.
Compliance with the following rules is also recommended:
- Even circuit-breakers that are operated infrequently or that remain closed or open for long periods of time must be subjected
to programmed maintenance.
- Installation of the mechanical operation counter (supplied on request) is recommended for circuit-breakers equipped with SACE
PR232 and PR331 releases. The SACE PR232 release with Vaux allows the number of operations performed by the circuit-
breaker in service to be shown at all times on the relative display.
- During service, visually inspect the circuit-breaker from the outside to make sure there is no dust, dirt or damage of any kind.
Maintenance operations
Intervals
Installations in normal places
Installations in dusty or polluted places
( 1)/( 2)
[
(1) = level of dust measured > 1 mg/m³ ]
First Level
One year, or 20% of mechanical life, or 20%
of electrical life
6 months, or 10% of mechanical life, or 10%
of electrical life
Second Level
Three years, or 50% of mechanical life, or
50% of electrical life, or after a trip under
short-circuit
18 months, or 25% of mechanical life, or
25% of electrical life, or after a trip under
short-circuit
(1) These data refer to the standard installation in accordance with the product standards. Ask ABB Sace if different applications are involved.
(2) Extreme weather conditions, polluted atmosphere or vibrations can reduce the life of the application. Ask ABB Sace.