10
Rockwell Automation Publication 1608M-IN002A-EN-P - January 2016
MegaDySC Dynamic Voltage Sag Corrector
MegaDySC System Installation Connections Checklist
• Connect the Automatic Bypass Switchboard ground bus to an Earth Ground in accordance with the National Electrical Code and local
codes.
• Connect the AC input (line) conductors to the terminals labeled ‘L1’, ‘L2’ and ‘L3’. The set is labeled ‘UTILITY INPUT’. These terminals
are left of the switchboard. See
.
• Connect the AC output (load) conductors to the terminals labeled ‘X1’, ‘X2’ and ‘X3’. The set is labeled ‘OUTPUT TO PROTECTED
LOADS’. See
• For 4-wire models only: connect input and output Neutral (N) conductors to the NEUTRAL bus bar. The input N connection is required
for proper operation of 4-wire models. Do not connect to the NEUTRAL bus bar in 3-wire models.
• Check all electrical terminations for properly torqued connections. See
• For i-Sense Communication: connect either an analog telephone line to RJ11 jack or Ethernet cable to RJ45 jack. The RJ11 and RJ45 jacks
are in the upper switchboard compartment. They can be accessed through a
1" conduit knockout in the top of the cabinet.See
i-Sense Voltage Monitor Communication on page 12
MegaDySC System Interconnections Checklist
• Connect the Automatic Bypass (ABP) Switchboard-to-MegaDySC ground cable to the vertical strut in the MegaDySC cabinet at the
location labeled with the ground symbol.
• Connect line side cables from input circuit breaker (CBI) in the ABP Switchboard to the MegaDySC section bus bars labeled RH1-L1,
RH1-L2 and RH1-L3 respectively.
• Connect load side cables from the output circuit breaker (CBO) in the ABP Switchboard to the MegaDySC section bus bars labeled RH1-
X1, RH1-X2 and RH1-X3 respectively.
• Plug the control cable from the ABP Switchboard into the MegaDySC cabinet.
Communication
Remote Diagnostics and Remote Bypass
Relay dry contacts are available for remote monitoring of the state of the Bypass Circuit Breaker CBB and the Input Circuit Breaker CBI shunt-trip
condition (See
). In addition, a customer-supplied relay can be used to remotely command a Seamless Bypass operation, as described in
Publication 1608M-UM005. These functions are available from terminal block TB1 in the upper compartment of the bypass switchboard. See
for recommended conduit entry location.
Figure 7 - Schematic Diagram - Status Relay Contacts
IMPORTANT
To be completed by factory-trained technician
CBB
N/C
CBB
N/O
1
2
3
4
5
6
7
8
9
10
11
12
TB1
K1
Customer
Supplied
Contact:
Close
to
Command
Seamless
Bypass
MegaDySC
Customer