Routine Service And Calibration Requirements - Firepower MST 180i Operating Manual

Firepower MST 180i

5.02 Routine Service and Calibration Requirements

There are extremely dangerous voltage and power levels present inside this Power Source. Do not attempt to
open or repair unless you are an accredited Firepower Service Provider. Disconnect the Welding Power Source
from the Electricity Supply Voltage before disassembling.
Routine Inspection, Testing & Maintenance
The inspection and testing of the Power Source and associated accessories shall be carried out in accordance with Section
5 of EN 60974-1: Safety in Welding and Allied Processes-Part 2 Electrical. This includes an insulation resistance test and an
earthing test to ensure the integrity of the Power Source is compliant with Firepower's original specifications.
If equipment is to be used in a hazardous location or environments with a high risk of electrocution as outlined in EN 60974-
1, then the above tests should be carried out prior to entering this location.
A. Testing Schedule
1. For transportable equipment, at least once every 3 months; and
2. For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record of the periodic tests and a system of tagging, including the
date of the most recent inspection.
A transportable Power Source is deemed to be any equipment that is not permanently connected and fixed in the posi-
tion in which it is operated.
Please refer to local guidelines for further information.
B. Insulation Resistance
Minimum insulation resistance for in-service Firepower Power Sources shall be measured at a voltage of 500V between
the parts referred to in Table 6-1below. Power Sources that do not meet the insulation resistance requirements set out
below shall be withdrawn from service and not returned until repairs have been performed such that the requirements
outlined below are met.
Input circuit (including any connected control circuits) to welding circuit
(including any connected control circuits)
All circuits to exposed conductive parts
Welding circuit (including any connected control circuits) to any auxiliary
circuit which operates at a voltage exceeding extra low voltage
Welding circuit (including any connected control circuits) to any auxiliary
circuit which operates at a voltage not exceeding extra low voltage
Separate welding circuit to separate welding circuit
Table 5-2: Minimum Insulation Resistance Requirements: Firepower Power Sources
C. Earthing
The resistance shall not exceed 1Ω between any metal of a Power Source where such metal is required to be earthed, and -
1. The earth terminal of a fixed Power Source; or
2. The earth terminal of the associated plug of a transportable Power Source
TROUBLE SHOOTING AND SERVICE
WARNING
NOTE
Components to be Tested
5-2
Minimum Insulation
Resistance (MΩ)
5
2.5
10
1
1
Manual 0-5339