MTE Corporation

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Can MTE STANDARD products be Combined to increase the Current Carrying Capability?

1. "M5 & M8" Matrix Harmonic Filters: YES, with 5% Derating.
2. "RF" RFI/EMI Filters: YES, with 10% Derating.
3. "RL" Reactors: YES, with NO Derating on Fundamental Rating.
4. "RB" DC Link Chokes: YES, with NO Derating on Fundamental Rating.
5. Other Products: Contact MTE.
6. Paralleling Rules, applicable to all of the above:

Equal current sharing between the units is of paramount importance.

At all times, these rules must be in compliance with US NEC and the Electrical Codes governing at the Installation Site.

Use Power Distribution Devices of the following types:

Blocks: Multiphase, Multipoint, or
Blocks: Single Phase, Multipoint, or
Bus Stubs mounted on Glastic, or similar, standoffs, or
Buswork System, consisting of the Horizontal Bus, and several Vertical Busses.

Mount the above Distribution Devices to be equidistant from all the Paralleled Units, or use Oversized Buswork.

Mount or Brace the above to withstand the forces associated with expected Short Circuit Current.

Upon completion of the layout of the units to be paralleled, determine the length of the wire necessary to connect a distribution point and the respective terminal on the unit farthest from that point.

All the phase wires must be of the same wire type and gauge.
Precut all the wires to the same exact length.

If pressure Lugs are used, make sure the exposed wire insertion depths and the torques are equal between all terminals.

If ring type lug terminations are used, as with the buswork or bus stubs, make sure that the same type compression tool and key were used to crimp the terminals. Verify final results using milliohm meter. When installing, make sure the same size and type bolts, nuts, and washers are used. Torque all terminations to the same value.

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