GMW 5203, User Manual

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8
2.2 5203 Electrical and Water Cooling Connections
DC Current
The 5203 electromagnet is shipped with the power and water connections
between the junction box and the magnet head connected. In the event that
these connections are broken, the correct reconnections can be made by
referencing drawings 11907-0224-0_S2 and 11907-0233-0_S1.
Ground
The coil cooling plates, the magnet body and the base plate are all earthed
through the power supply earth.
Interlocks
The Model 5203 has a single thermostat, Selco part no UP62-080C. It is
(refer Section 8) located between the base yoke plate and the lower cooling plate. The
thermostat is normally closed, opening when the coil heatsink temperature
exceeds 80°C, ± 5°C. In addition, a water flow switch is located in the
junction box. This is normally open and will close once the flow rate rises
above 1.5 US GPM.
Water
Clean, cool (16°C - 20°C) water at 8.0 lpm at 4.0 bar (60 psid) should be used
to cool the 5203 magnet. This can be provided by house water supply or from
a recirculating chiller. An appropriate recirculating chiller is the TF90 from
Thermofisher. The magnet is shipped with a cable junction box connected,
water connections should be made to the two connections on this junction
box. The flow direction is indicated on the side of the flow switch. Refer to
drawing 11907-0224-0_S2_F. If house water supply is used, an in-line 5
micron water filter should be used for the supply line to the magnet. Also,
10m of hose is provided to give two 5m lengths for connection between the
magnet and the recirculating chiller (if ordered), brass fittings on the chiller
are already provided. Note that 4 hose clamps have also been provided for
fitting these water hoses. The power cable that connects the power supply to
the magnet (16907-0116-1-S1_A) is also provided.
Outlet: 1/4 inch Swagelok
Inlet: 1/4 inch Swagelok
CAUTION
Ensure that the high current connections are tight. Loose connections may
lead to oxidation and overheating. The field stability may be degraded and
the current terminations damaged.