CyberPower MBS100D5B User manual

K01-0001003-00
MBS100D5B
MBS175D5B
INSTALLATION MANUAL
MAINTENANCE BYPASS SWITCH
EN

CONTENTS
1 . SAFETY PRECAUTIONS.................................................................................1
2. PACKAGE CONTENTS .................................................................................. 2
3. MBS CONFIGURATION ................................................................................. 3
4. MBS WIRING DIAGRAM................................................................................ 4
5. MBS OPERATION PANEL DESCRIPTION ................................................... 5
6. MBS POWER CABLE SELECTION ............................................................... 6
7. MBS INSTALLATION SPACE ........................................................................ 9
8. INSTALLATION PROCEDURE .................................................................... 10
8-1 . Wall-Mount Installation.................................................................................... 10
8-2 . Power Cables Installation ................................................................................12
8-3 . Dry Contact Connection ..................................................................................16
9. PRODUCT SPECIFICATION.........................................................................18

1
1. SAFETY PRECAUTIONS
This manual contains important instructions for Models
that should be followed during installation and maintenance of the UPS and batteries.
The product installation must be performed by engineers approved by the manufacturer (or
its agent) and must comply with local and national. Not doing so could result in personnel
safety risk, equipment malfunction, and invalidation of warranty.
WARNING:
Follow the installation manual to be performed; failure to follow these instructions may result
in death or severe injury.
WARNING:
Must disconnect all AC sources connected to the MBS product and that all Breaker in the OFF
position before installing and servicing.
WARNING:
Follow the space requirements of the product and do not cover the ventilation openings
when the product is in operation.
CAUTION:
For MBS100D5B:
To reduce the risk of fire, connect only to a circuit provided with 100A maximum branch
circuit overcurrent protection in accordance with the National Electrical Code, ANSI/NFPA 70
and the Canadian Electrical Code, Part I, C22.1.
For MBS175D5B:
To reduce the risk of fire, connect only to a circuit provided with 175A maximum branch
circuit overcurrent protection in accordance with the National Electrical Code, ANSI/NFPA 70
and the Canadian Electrical Code, Part I, C22.1.
NOTICE: 3-PHASE 4-WIRE INPUT POWER IS REQUIRED
The Maintenance Bypass Switch product can be connected to TN, TT AC distribution system
(IEC60364-3) of 3-phase 4-wire.
The instruction manual for a unit investigated for use in a CONTROLLED ENVIRONMENT shall
indicate that the unit is intended for installation in a temperature-regulated, indoor area that
is relatively free of conductive contaminants.

2
2. PACKAGE CONTENTS
The package should contain the following items:
# Items MBS100D5B MBS175D5B
1MBS Product 1
2Installation Manual 1
3M6 Screw 16*1 0
4M8 Screw 2*1 18*2
Note1:
M8 Screw 2 pcs for ground cable connection,
M6 Screw 16 pcs for the power cable connection.
Note2:
M8 Screw 2 pcs for ground cable connection,
M8 Screw 16 pcs for the power cable connection.
MBS Product M6 Screw M8 ScrewInstallation Manual

3
Single-Feed Configuration
Dual-Feed Configuration
3. MBS CONFIGURATION
CB3
CB5
UPS
INPUT Mains Input
(UTILITY INPUT)
Load
(SYSTEM OUTPUT)
Q1
Q2
Q3
MBP
UPS
OUTPUT
Battery
Cabinet SM UPS
CB3
CB1
CB5
UPS
INPUT Bypass Input
(UTILITY INPUT)
Mains Input
Load
(SYSTEM OUTPUT)
Q1
Q2
Q3
MBP
UPS
OUTPUT
Battery
Cabinet SM UPS

4
Breaker Specification
MBS100D5B
INPUT BREAKER
(Q1)
MAINTENANCE
BYPASS BREAKER
(Q2)
OUTPUT BREAKER
(Q3)
Rated Vatage 240 Vac 240 Vac 240 Vac
Phase 3 Phase 3 Phase 3 Phase
Rated Current 100 A 100 A 100 A
Interrupting Rating 50 kA 50 kA 50 kA
Pole 3 Pole 4 Pole 4 Pole
MBS175D5B
INPUT BREAKER
(Q1)
MAINTENANCE
BYPASS BREAKER
(Q2)
OUTPUT BREAKER
(Q3)
Rated Vatage 240 Vac 240 Vac 240 Vac
Phase 3 Phase 3 Phase 3 Phase
Rated Current 175 A 175 A 175 A
Interrupting Rating 50 kA 50 kA 50 kA
Pole 3 Pole 4 Pole 4 Pole
4. MBS WIRING DIAGRAM
Q1 UPS INPUT
TO UPS
BYPASS/INPUT
FROM
UTILITY
FROM
UPS OUTPUT
TO LOAD
Q2
BYPASS
Q3
UPS OUTPUT
L1
L1L1
L1
L2
L2L2
L2
L3
L3L3
L3
N
NN
G
GG
N

5
MBS operation panel description as shown below:
5. MBS OPERATION PANEL DESCRIPTION
INPUT
BREAKER (Q1)
OUTPUT
BREAKER (Q3)
UPS OUTPUT
UTILITY INPUT
MAINTENANCE COVER
MAINTENANCE BYPASS
BREAKER (Q2)
SYSTEM OUTPUT
UPS INPUT

6
6. MBS POWER CABLE SELECTION
Design the cables according to the descriptions in this section and local regulatory wiring
standards, and the environmental conditions (temperature and physical support media)
should be taken into consideration.
Read and understand the following notes while planning and performing the installation:
WARNING:
FAILURE TO FOLLOW ADEQUATE EARTHING PROCEDURES CAN RESULT IN EMI, ELECTRIC
SHOCK HAZARD, OR RISK OF FIRE, SHOULD AN EARTH FAULT OCCUR.
WARNING:
As a result of the connected loads high leakage current is possible. Connection to earth
ground is required for safety and proper product operation. Do not check UPS operation by
any action that includes removal of the earth (ground) connection with loads attached.
Refer to national and local electrical codes for acceptable external wiring practices.
• To allow for future power upgrades, recommends install the UPS using wiring and external
overcurrent protection breakers sized for fully rated UPS kW frame size instead of the
de-rated kW ordered.
Wiring for the maximum kW frame size will allow a full power rating upgrade without
having to modify the site wiring infrastructure.

7
6. MBS POWER CABLE SELECTION
• Material and labor for external wiring requirements are to be provided by the customer.
• For external wiring, use 75°C copper wire. If wire is run in an ambient temperature greater
than 40°C, higher temperature wire and/or larger size wire may be necessary.
• Wire ampacities are chosen from Table 310-16 of the National Electrical Code® (NEC). The
specification is for copper wire with a 75°C rating.
• Refer to NEC Article 250 and local codes for proper grounding practices.
• Supported single-feed or dual-feed power source:
- 3P+N+PE Wye (TT, TN) – Rectifier Input
- 3P+N+PE Wye (TT, TN) – Bypass Input

8
MBS POWER CABLE SELECTION
MBS100D5B Power Cable Size
Location
CABLE SECTION (AWG)
SM UPS 10KVA SM UPS 20KVA
FROM UTILITY (L1/L2/L3/N) 2 2
TO UPS INPUT BYPASS/INPUT (L1/L2/L3/N) 10 4
FROM UPS OUTPUT (L1/L2/L3/N) 10 4
TO LOAD (L1/L2/L3/N) 10 4
PE (FROM UPS) 10 8
PE (FROM UTILITY ) 2 2
MBS175D5B Power Cable Size
Location
CABLE SECTION (AWG)
SM UPS
10KVA
SM UPS
20KVA
SM UPS
30KVA
SM UPS
40KVA
FROM UTILITY
(L1/L2/L3/N) 3/0 3/0 3/0 3/0
TO UPS INPUT
BYPASS/INPUT
(L1/L2/L3/N)
10 4 2 1/0
FROM UPS OUTPUT
(L1/L2/L3/N) 10 4 2 1/0
TO LOAD
(L1/L2/L3/N) 10 4 2 1/0
PE (FROM UPS) 10 8 6 6
PE (FROM UTILITY ) 3/0 3/0 3/0 3/0
If MBS product is connected to the UPS model (SM020KAMFA, SM040KAMFA), please refer
to the UPS manual for the wire size diameters.

9
7. MBS INSTALLATION SPACE
Refer to the below figure to determine the MBP installation space. Consult with the local
safety codes and standards for additional installation requirements.
It’s recommended to install the MBS near the UPS.
200 mm
7.87 in
200 mm
7.87 in
800 mm
31.50 in
550 mm
21.65 in

10
8. INSTALLATION PROCEDURE
8-1. Wall-Mount Installation
Step 1. Refer to chapter 7 to choose a space that does not block the ventilation holes for
installation.
Step 2. Remove the screws and open the door on the MBS

11
8-1. Wall-Mount Installation
Step 3. Use the recommended screws to install the MBS product. (Recommend screws:
Metric M8 self-tapping screws, 5/16” expansion screws, and wood screws No.20)
8. INSTALLATION PROCEDURE
457 mm
17.99 in
508 mm
20.00 in

12
8. INSTALLATION PROCEDURE
8-2. Power Cables Installation
Step 1. Follow Chapter 8-1 Step 1.
Step 2. Remove the gland plates at the top or bottom of the MBS.
Step 3. Drill the holes on the gland plates for signal and power cables and use the cable
gland if feasible.
Warning : Evaluate the appropriate-sized holes to prevent the risk of electric shock to
personnel.
Danger : HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Ensure that there
are no sharp edges that can damage the cables. Failure to follow these instructions
will result in death or serious injury.
Steps 4 to 6 based on the top cable entry as an example.

13
8. INSTALLATION PROCEDURE
Step 4. Connect the ground cable.
Step 5. The MBS Breaker wiring symbols are shown below. Please follow these instructions
for wiring:
Protective earthing
conductor terminal
From mains utility
Protective bonding
conductor terminal
Connect to UPS
System
UPS INPUT
BREAKER
MAINTENANCE
BYPASS
BREAKER
UPS OUTPUT
BREAKER
L1
L1
L1
L1
L2
L2
L2
L2
L3
L3
L3
L3
N
N
N
N

14
8. INSTALLATION PROCEDURE
Step 6. Connect the input cables from the utility (mains) for single-feed configuration, or
connect the bypass cables from the utility (mains) for dual-feed configuration.
Step 7. Connect the UPS input cables for single-feed configuration, or connect the UPS
bypass cables for dual-feed configuration.
L1
L2
L3
N
L1
L2
L3
N

15
8. INSTALLATION PROCEDURE
Step 8. Connect the UPS output cables.
Step 9. Connect the MBS system output cables to load.
L1
L2
L3
N
L1
L2
L3
N

16
8-3. Dry Contact Connection
Dry contact descriptions
MBS UPS Signal Function
1, 2
(J8-2, J8-3)
(J9-2, J9-3)
(J10-2, J10-3)
(Optional)
Backfeed Protection
When UPS is in the battery
mode, and detects “Bypass
Module Fail-Set” UPS sends a
short signal to the B1 Breaker
that trip to ensure the UPS
input does not exist hazardous
voltages.
3, 4 (J7-1, J-2) Maintenance Bypass
Remove the maintenance
cover, MBS sends a short signal
to the UPS, UPS transfers to
the Bypass mode.
After maintenance, please follow the below procedure to restart the inverter as below:
1 . Ensure MBS dry contact / connect to UPS J7-1/J7-2.
2 . Turn on input/output breaker
3 . Ensure UPS is on the bypass mode (UPS has normal output)
4 . Turn off maintenance breaker
5 . Restore maintenance cover, wait for UPS to restart the inverter
8. INSTALLATION PROCEDURE
3 4
J8-2 and J8-3 for Backfeed Protection signal
J7-1 and J7-2 for Maintenance Bypass signal
1
2
3
4
SM UPS
Dry Contact Port
J8-2
J8-3
J7-1
J7-2

17
Function Setting on the UPS
Backfeed Trip Setting on the UPS
(J8, J9, J10 Optional)
Transfer Bypass Setting on the UPS
8. INSTALLATION PROCEDURE
System Setting Battery Setting Customization WarningSet DryContactSet
InputDryContact OutputDryContact
J5 J6-1Generator Input BCB Trip
BCB Status Byp Backfeed Trip
BCB Online General Alarm
Utility Fail
J6-2 J8
J7 J9
J10
System Setting Battery Setting Customization WarningSet DryContactSet
InputDryContact OutputDryContact
J5 J6-1Generator Input BCB Trip
BCB Status Batt Volt Low
Maint CB Close General Alarm
Utility Fail
J6-2 J8
J7 J9
J10