Operator's Manual High Pressure Breathing Air Compressors

Operator’s Manual
3.5. ELECTRICAL INSTALLATION
For installation of electrical equipment observe the following:
-- Observe regulations of local electricity supply company.
-- Arrange for the electrics to be connected by an electrician only.
-- If control devices are delivered by the factory refer to the appropriate wiring diagram.
-- Ensure correct installation of protective conductor.
-- Check conformity of motor and control device tension and frequency with those of electric network.
-- The necessary cables, main fuses and main switch are to be provided by the customer. The fusing should be done in accordance
with the regulations of the responsible electricity supply company.
-- Adjust motor protection, thermal overload relay. For start over contactor adjust to motor amperage rating. For start via star--delta
contactor adjust to motor amperage rating x 0.58.
For example: motor amperage rating = 10 Amp.:
Adjust relay to 10 x 0.58 = 5.8 Amp.
-- When connecting the unit to the electrical supply, check direction of rotation for agreement with arrow on unit.
-- Fuse motor correctly (see table below; use slow -blow fuses).
FUSE TABLE
Motor type Voltage V 125 220 240 380 415 440 500 600 660
3--phase, 2.2 kW
(star--delta starting)
current A 20 10 10 6 6 6 6 4 4
3--phase, 2.2 kW
(direct starting)
current A 25 16 16 10 10 6 6 6 6
3--phase, 3 kW
(star--delta starting)
current A 25 16 16 10 10 10 10 6 4
3--phase, 3 kW
(direct starting)
current A 35 20 20 16 16 10 10 6 6
3--phase, 4 kW
(star--delta starting)
current A 35 20 20 10 -- -- 10 10 10 6
3--phase, 4 kW
(direct starting)
current A 35 25 25 16 -- -- 16 16 10 10
3--phase, 5.5 kW
(star--delta starting)
current A 50 25 25 16 16 16 10 10 10
3--phase, 5.5 kW
(direct starting)
current A 63 35 35 20 20 20 16 16 16
3--phase, 7.5 kW
(star--delta starting)
current A 50 35 35 20 16 16 16 16 10
3--phase, 7.5 kW
(direct starting)
current A 63 35 35 25 25 25 20 16 16
3--phase, 11 kW
(star--delta starting)
current A -- -- 50 50 25 25 25 20 20 16
3--phase, 11 kW
(direct starting)
current A -- -- 63 50 35 35 35 25 25 25
3--phase, 15 kW
(star--delta starting)
current A -- -- 63 63 35 35 35 25 25 20
3--phase, 15 kW
(direct starting)
current A -- -- 80 80 50 35 35 35 35 25
3--phase, 18.5 kW
(star--delta starting)
current A -- -- 80 63 50 50 35 35 25 25
3--phase, 18.5 kW
(direct starting)
current A -- -- 100 80 63 50 50 50 35 35
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