Parallel & Three-Phase Connections; Parallel Operation; Three-Phase Connection Operation - Sola HD CVS Hardwired Série Mode D'emploi

5.1 Parallel operation

Units of the same SolaHD catalog number may be connected in parallel to obtain a larger load capacity. Both input and output
connections must be made in parallel (see Figure 6). The SolaHD catalog number must end in -8 or -C8 and must be larger than 1
kVA. no portable units can be paralleled.
All input and output paralleling wires must be tied together in an external paralleling "box" provided by the user. Do not attempt to
jumper the wires of one unit to the terminal block of the other unit. The terminal block may not be rated to carry the total currents
of both units. The input of each unit must be properly and separately fused.
Caution! Failure to adhere to these requirements may damage the windings.
!
For units smaller than 5 kVA: When connecting in parallel the 208 Volt windings, other output voltage ratings (120 V, 240 V) can't
be paralleled at the same time and vice versa. It is suggested that the installer remove X2 grounding on each unit, then connect
X2 from each unit to one location and ground at that location only.

5.2 three-Phase Connection operation

Loads requiring 4-wire WYE connection may be served by three ferroresonant power conditioners with the same SolaHD catalog
number. The inputs must be connected in Delta. Input fuses must be connected in the primary of each unit, not in the three-phase
lines. The outputs must be connected in WYE with the neutral solidly connected to a WYE load. Alternatively, these three outputs
may serve three independent single-phase loads. Phase angles may vary somewhat from 120 degrees even with balanced
loading.
This circuit arrangement is not intended to serve single-phase line-to-line loading or three-phase Delta loading. Outputs must
serve three independent, single-phase loads of the same total Volt-Amphere (VA) rating. Connections should be made in one of
two ways as shown in Figure 6.
The outputs of the unit are isolated from the input lines. Voltage generated by internal leakage currents will occur with respect
to ground, which can have undesirable effects in electronic equipment. Therefore, if circuit "B" is used, it is suggested that the
installer remove X2 grounding on -8 units, then connect all X2 from each phase to one location and ground at that location only.
This is not required for circuit "A" and will not affect regulation or the ability to reject power line noise or transients.
A
CV
Trans
Load
(A) Isolated Single-Phase Loads
A
CV
Trans
Load
(B) Separte Single-Phase Loads
Figure 6
In Grounded WYE
5.0 Parallel & Three-Phase Connections
B C
CV CV
Trans Trans
Load Load
B
C
CV CV
Trans Trans
Load Load
Input
Ac Single-Phase
Input
Input
Unit A
Output
Unit B
Output
CVS HARDWIRED SERIES USER MAnUAL | 9