Mounting

Refer to the table below for the maximum allowable torque values

Bus Bar Guidelines for CSP / CP / CPRI / C500T / C700T CapacitorsBus bars used with CSP, CP, CPRI, C500T and C700T capacitors must be thin and flexible to ensure reliable thermal and electrical contact. We recommend using copper bars 3 mm thick to achieve the required flexibility. This flexibility helps maintain stable contact and prevents mechanical stress or pulling on the capacitor electrodes during installation.If the specified torque does not result in sufficient thermal or electrical contact, it may indicate that the gap between the bus bars is incorrect or that the bars themselves are not perfectly flat. To verify proper installation, we recommend checking with a filler gauge.Warning: Inadequate contact between the capacitor and bus bars can lead to misleading symptoms—such as cool outlet water and a cool bus bar—while the capacitor itself overheats internally.

Important: Do not overtighten the capacitor mounting screws, as this can damage the capacitors.

C-CAP mounting

Busbar design

C-CAP is designed to be connected unilaterally on two busbars separated by an insulation such that the magnetic field is confined between the busbars and the C-CAPs are not affected by it. The busbars and insulation should be sandwiched tightly by insulated fasteners.

Busbars must be flat and fully aligned prior to mounting of the C-CAPs. The C-CAPs must not be used to align, straighten, compress, or support the busbar.

Busbars should be made with at least 3 mm copper and at least 3 mm Teflon insulation.

Holes in the busbars (see illustration at the bottom)

Holes in the bottom busbar (which is in contact with the upper face of the C-CAP): for the central rod of the C-CAPs 25 mm holes to enable free contactless passage.

For the M6 mounting screws 6.5 mm holes with a 12.5 mm 90° chamfer.

Avoid using M6 screws which are too long, too long screws can penetrate the top electrode and damage the bobbin.

Holes in the top busbar: for the central rod of the C-CAPs 18 mm holes.

For the M6 mounting screws 16 mm holes to enable free contactless passage.

Holes in the insulation can be as small as possible to increase creepage distance.

Busbar cooling 

Busbars should be kept at a temperature cooler than the capacitors to avoid heating of the capacitors by the busbars. In case of high current flowing in the busbar, the capacitors’ cooling is insufficient to cool the busbars and busbars should be cooled separately.

1. Mechanical mounting to the bottom busbar using 4 x M6 countersunk screws at 5-10 Nm, ensuring good thermal contact with thermal conductive material (paste or thick silicone oil).
2. Electrical connection of the C-CAP is done via tightening the M16 nut onto the top busbar at 8-10 Nm. Ensuring flatness and good contact of the nut with the busbar. It is recommended to verify good contact with a gauge. The M16 rod is water-cooled and soldered to the bottom electrode of the C-CAP. Over tightening of the M16 nut will result in breaking of the soldering and water leakage

C-CAP cooling

C-CAP should be cooled from bottom to the top. The cooling of the bottom electrode is internally connected to the M16 rod. The top electrode can be also cooled by the bottom bus bar on which is it mounted. Losses should be considered as 1/1000-1/700 of the reactive power. 1000 Watt will increase the temperature of 1 liter of water by 14°C at a flow of 1 L/min. Outlet water must not exceed 40°C. The external temperature of the C-CAP must not exceed 45°C. It is highly recommended to connect the integral thermal switch of the C-CAP. In cases where water is connected in series and high voltage is used, equipotential electrodes should be connected in series to avoid voltage buildup.

First operation

Prior to the first operation it is recommended to check screws and nuts. During the first minutes of operation all capacitors should be inspected using an IR camera for validation of adequate water cooling and absence of hotspots.

Typical mounting description

Kit content list:

• 1 air grippers MHS3-50D.
• 1 clamps set for MHS3-50D.
• 1 magnetic micro switches 3C-D-Z73 for MHS3-50D positioning system. ü 1 Switching nuts for C-CAP

Recommended air pressure 5-7 bars

Kit does not include the following needed parts:

• Mechanical construction (busbar, bridge for clamps, plastic pillars etc.) ü Air connector, nipples and air pipe.
• 24VDC air valves and hub
• 24VDC power supply

24VDC air solenoid valve and hub (nut included)

Q-CAP / V-CAP mounting

Q-CAP/V-CAP 04 was designed to further increase the flexibility of C-CAP series and enable conduction cooling.Q-CAP/V-CAP 04 has an excellent price/kVAr ratio. Q-CAP/V-CAP 04 is protected by US Patent 9799454.

Like the C-CAP, Q-CAP/V-CAP is designed to be connected unilaterally on two busbars separated by an insulation such that the magnetic field is confined between the busbars and the Q-CAP/V-CAPs are not affected by it.

The busbars and insulation should be sandwiched tightly by insulated fasteners.

Busbars must be flat and fully aligned prior to mounting of the Q-CAP/V-CAPs. The Q-CAP/V-CAPs must not be used to align, straighten, compress, or support the busbar.

Busbars should be made with at least 3 mm copper and at least 3 mm Teflon insulation.

Holes in the busbars (see illustration at the bottom)

Holes in the bottom busbar (which is in contact with the upper face of the Q-CAP/V-CAP):

For the central rod of the Q-CAP/V-CAPs 25 mm holes to enable free contactless passage.

For the M6 mounting screws, 6.5 mm holes with a 12.5 mm 90° chamfer.

Avoid using M6 screws which are too long, as they might penetrate the top electrode and damage the bobbin.

Holes in the top busbar:

For the central rod of the Q-CAP/V-CAPs 18 mm holes.

For the M6 mounting screws 16 mm holes to enable free contactless passage.

Holes in the insulation can be as small as possible to increase creepage distance.

Busbar cooling 

Busbars should be kept at a temperature cooler than the capacitors to avoid heating of the capacitors by the busbars. In case of high current flowing in the busbar, the capacitors’ cooling is insufficient to cool the busbars and busbars should be cooled separately.