S&C IPERC GridMaster User manual

August 19, 2019
© S&C Electric Company 2019, all rights reserved Instruction Sheet 1025-511
GridMaster®Microgrid Control System Rack Mounting Configuration
Installation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ........................... 2
Read this Instruction Sheet ................... 2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . 2
Proper Application .......................... 2
Operating Considerations..................... 2
Special Warranty Provisions................... 3
Warranty Qualifications ...................... 3
Safety Information
Understanding Safety-Alert Messages........... 4
Following Safety Instructions .................. 4
Replacement Instructions and Labels ........... 4
Safety Precautions ......................... 5
Shipping and Handling
Inspection ................................. 6
Packing ................................... 6
Installation
Before Starting ............................. 7
Installing the Rack-Mounted GridMaster Controller . 8
Making the Control Power, Data, and GPS
Connections ............................. 9
Option Plate ...............................10
Final Setup and Checkout ....................10
Appendix
General Specifications .......................11
Module Pinouts .............................11

2S&C Instruction Sheet 1025-511
Introduction
Qualified Persons WARNING
Only qualified persons who are knowledgeable in the installation, operation, and
maintenance of overhead and underground electric distribution equipment, along
with all associated hazards, may install, operate, and maintain the equipment covered
by this publication. A qualified person is someone who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from nonlive
parts of electrical equipment
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltages to which the qualified person will be exposed
• The proper use of special precautionary techniques, personal protective equipment,
insulating and shielding materials, and insulated tools for working on or near
exposed energized parts of electrical equipment
These instructions are intended ONLY for such qualified persons. They are not
intended to be a substitute for adequate training and experience in safety procedures
for this type of equipment.
Read this
Instruction Sheet NOTICE
Thoroughly and carefully read this instruction sheet before installing or operating
your GridMaster Microgrid Control System. Familiarize yourself with the Safety
Information pages 4 through 5. The latest version of this publication is available
online in PDF format at sandc.com/en/support/product-literature/.
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your GridMaster Microgrid Control System.
Designate a location where you can easily retrieve and refer to this publication.
Proper Application WARNING
A GridMaster controller is only intended for use in the GridMaster Microgrid Control
System. Application information for the S&C Microgrid Control System is listed in
Specification Bulletin 1025-31 and with the system diagram drawings provided by
S&C Electric Company.
Operating
Considerations
A GridMaster Microgrid Control System enables intelligent electronic devices to be
incorporated into a microgrid. Each GridMaster controller operates as a member of a peer-
to-peer network that ensures electrical demand is met while eliminating single points of
failure. GridMaster controllers are used to monitor and switch new or existing renewable
sources of energy such as wind and solar, critical and non-critical loads (prioritized load
shedding), utility and non-utility sources of generation, and energy storage to allow for
islanding of electrical loads. The GridMaster controller is also capable of recognizing
when devices and equipment are unavailable and can compensate for such contingencies.
The GridMaster controller operates in tandem with the controls of its associated intelligent
electronic device (IED). It does not directly provide switching capabilities but does
interface with the IED controls to do so. It is powered through a connection with the
IED and may be supplied with an optional backup battery system. For more information
on the operation of the GridMaster controller, see S&C Instruction Sheet 1025-530, “S&C
GridMaster® Microgrid Control System: Operation.”

S&C Instruction Sheet 1025-511 3
Introduction
Special Warranty
Provisions
The standard warranty contained in the seller’s standard conditions of sale, as set forth
in Price Sheet 150, applies to GridMaster Microgrid Control System, except that the rst
paragraph of said warranty is replaced by the following:
(1) General: The seller warrants to the immediate purchaser or end user for a period
of 10 years from the date of shipment that the equipment delivered will be of the
kind and quality specified in the contract description and will be free of defects of
workmanship and material. Should any failure to conform to this warranty appear
under proper and normal use within 10 years after the date of shipment, the seller
agrees, upon prompt notification thereof and confirmation that the equipment has
been stored, installed, operated, inspected, and maintained in accordance with
recommendations of the seller and standard industry practice, to correct the non-
conformity either by repairing any damaged or defective parts of the equipment
or (at the seller’s option) by shipment of necessary replacement parts. The seller’s
warranty does not apply to any equipment that has been disassembled, repaired, or
altered by anyone other than the seller. This limited warranty is granted only to the
immediate purchaser or, if the equipment is purchased by a third party for instal-
lation in third-party equipment, the end user of the equipment. The seller’s duty to
perform under any warranty may be delayed, at the seller’s sole option, until the
seller has been paid in full for all goods purchased by the immediate purchaser. No
such delay shall extend the warranty period.
Replacement parts provided by the seller or repairs performed by the seller
under the warranty for the original equipment will be covered by the above special
warranty provision for its duration. Replacement parts purchased separately will
be covered by the above special warranty provision.
Warranty
Qualifications
Warranty of a GridMaster Microgrid Control System is contingent upon the installation,
conguration, and use of the control and software in accordance with S&C’s applicable
instruction sheets. This warranty does not apply to major components not manufactured
by S&C, such as batteries, communication devices, and the IED associated with the
controller. However, S&C will assign to the immediate purchaser or end user all
manufacturers’ warranties that apply to such major components.

4S&C Instruction Sheet 1025-511
Safety Information
Understanding
Safety-Alert
Messages
Several types of safety-alert messages may appear throughout this instruction sheet
and on labels and tags attached to your S&C GridMaster Microgrid Control System.
Familiarize yourself with these messages and the importance of these signal words:
DANGER
“DANGER” identifies the most serious and immediate hazards that will likely result in
serious personal injury or death if instructions, including recommended precautions,
are not followed.
WARNING
“WARNING” identifies hazards or unsafe practices that can result in serious personal
injury or death if instructions, including recommended precautions, are not followed.
CAUTION
“CAUTION” identifies hazards or unsafe practices that can result in minor personal
injury if instructions, including recommended precautions, are not followed.
NOTICE
“NOTICE” identifies important procedures or requirements that can result in product
or property damage if instructions are not followed.
Following Safety
Instructions
If you do not understand any portion of this instruction sheet and need assistance, contact
your nearest S&C Sales Ofce or S&C Authorized Distributor. Their telephone numbers
are listed on S&C’s website sandc.com, or call the S&C Global Support and Monitoring
Center at 1-888-456-1100.
NOTICE
Read this instruction sheet thoroughly and carefully
before installing your GridMaster Microgrid Control
System.
Replacement
Instructions
and Labels
If additional copies of this instruction sheet are needed, contact your nearest S&C
Sales Ofce, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada
Ltd. The latest version is available online in PDF format at sandc.com/en/Support/
Product-Literature/.
It is important that any missing, damaged, or faded labels on the equipment be replaced
immediately. Replacement labels are available by contacting your nearest S&C Sales
Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.

Safety Precautions
DANGER
The S&C GridMaster Microgrid Control System may be installed in equipment
that operates at high voltage. Failure to observe the precautions below will
result in serious personal injury or death.
Some of these precautions may differ from your company’s operating procedures
and rules. Where a discrepancy exists, follow your company’s operating procedures
and rules.
1. QUALIFIED PERSONS. Access to the GridMaster
Microgrid Control System must be restricted only to
qualified persons. See the “Qualified Persons”
section on page 2.
2. SAFETY PROCEDURES. Always follow safe
operating procedures and rules.
3. PERSONAL PROTECTIVE EQUIPMENT. Always
use suitable protective equipment, such as rubber
gloves, rubber mats, hard hats, safety glasses, and
flash clothing, in accordance with safe operating
procedures and rules.
4. SAFETY LABELS. Do not remove or obscure any
of the “DANGER,” “WARNING,” “CAUTION,” or
“NOTICE” labels and tags. Remove tags ONLY if
instructed to do so.
5. ENERGIZED COMPONENTS. Always consider all
parts live until de-energized, tested, and grounded.
6. MAINTAINING PROPER CLEARANCE. Always
maintain proper clearance from energized
components.
S&C Instruction Sheet 1025-511 5

6S&C Instruction Sheet 1025-511
Shipping and Handling
Inspection
Examine the shipment for external evidence of damage as
soon after receipt as possible, preferably before removal
from the carrier’s conveyance. Check the bill of lading to
make sure the listed shipping skids, crates, and containers
are present. If there is visible loss or damage:
1. Notify the delivering carrier immediately.
2. Ask for a carrier inspection.
3. Note the condition of shipment on all copies of the
delivery receipt.
4. File a claim with the carrier.
If concealed damage is discovered:
1. Notify the delivering carrier within 15 days of receipt of
shipment.
2. Ask for a carrier inspection.
3. File a claim with the carrier.
Also, notify S&C Electric Company in all instances of
loss or damage.
Packing
A complete GridMaster Microgrid Control System consists
of the following components:
• The GridMaster controller
• This instruction manual

S&C Instruction Sheet 1025-511 7
Installation
Before Starting
Familiarize yourself with the parts of the GridMaster
controller. See Figure 1.
Figure 1. GridMaster controller: rear view.
On/Off
Switch
Power
LED
Blank
Plate for
Options
Terminal 1 Terminal 2 GPS Antenna Ethernet 0 Ethernet 1

8S&C Instruction Sheet 1025-511
Installation
Installing the Rack-Mounted GridMaster
Controller
Rack-mounted GridMaster controllers can be installed in
a standard 1U slot in a 19-inch (483-mm) equipment rack.
To install the GridMaster controller into an equipment
rack:
STEP 1. Use best practices for installing rack equipment
by installing the heaviest equipment on the
bottom of the rack. On taller racks, this prevents
the equipment rack from becoming top heavy.
The GridMaster controller is lightweight at only
8 lbs (3.6 kg) and can be installed toward the top
of the rack.
STEP 2. Slide the microgrid controller into a 1U slot and
use the appropriately sized mounting screws
(10-32, 12-24, and M6 screws are most common)
to install the GridMaster controller to the rack.
See Figure 2. For installation in a rack without
threaded holes, cage nuts and screws are
recommended. Tighten the screws.
Figure 2. Rack dimensions and mounting hole centers.
464 mm
32 mm
44 mm
483 mm

S&C Instruction Sheet 1025-511 9
Installation
Making the Control Power, Data, and
GPS Connections
A GridMaster controller comes standard with connections
for power, two Ethernet ports, a coaxial port for connecting
a GPS antenna, and two screw terminal connectors. See
Figure 1 on page 7. Make the control power, data, and GPS
connections by completing the following steps:
STEP 1. If present, connect a GPS antenna to the female
coaxial connector on the controller.
STEP 2. Connect a solid-copper Ethernet cable to the
Ethernet 0 port on the controller. The other end
of the cable may be connected to either a radio,
a network switch, or directly to the local-area
network on which the GridMaster Microgrid
Control System will be interconnected.
STEP 3. The GridMaster controller can accept 24 Vdc
control power. Connect the two 12–30 AWG
wires from the control power source to the
GridMaster controller to the rst two (left-hand
facing) screw terminals of Terminal 1.
STEP 4. S&C recommends the control power source be
supported by an uninterruptable power supply
that can power the controller for at least one
hour after control power is lost.
STEP 5. If the associated IED communicates via
Ethernet, connect a solid-copper Ethernet cable
to the Ethernet 1 port. Connect the other end to
the IED according to the IED manufacturer’s
instructions.
STEP 6. A three-port RS-485 screw terminal comes
standard with the controller. To connect to a
RS-485 connector module, connect three 12 – 30
AWG wires to the screw terminal and tighten
the screws until they bottom out. Do not leave
the wires unsecured. The maximum
recommended length of wire is 1,000 meters
(3,281 feet). There is no required order for use of
the screw terminals. When using stranded wire,
S&C recommends coating the stranded ends
with tin-solder before insertion into the screw
terminals. The pinout is shown in the “Module
Pinouts” section on page 11.
Note: The RS-485 connection can communicate at
speeds up to 115200 baud and can be used to acquire data
from any compatible IED, including those that use the
Modbus protocol. Third party converters are available
to convert from RS-485 to RS-232 or RS-422. The port
is configured as Data Terminal Equipment (DTE). Both
the send and receive registers of the port have a 16-byte
FIFO and 16C550-compatable UARTs. Individual modem
handshake control signals are supported.

10 S&C Instruction Sheet 1025-511
Installation
Option Plate
A number of options, including digital Input/Output
connectors, CAN ports, and analog Input/Output ports, can
be custom-engineered and installed in place of the options
plate depending on the application. Wiring information on
the options will be provided as a part of the system diagram
supplied with the GridMaster Microgrid Control System.
Final Setup and Checkout
Before switching on and configuring the GridMaster
controller according to the instructions in S&C Instruction
Sheet 1025-530, check the following:
STEP 1. Make sure the GridMaster controller is securely
installed in the rack. Check all fasteners for
tightness.
STEP 2. Make sure all cable connections and wiring
connections to the GridMaster controller are
secure.
STEP 3. Turn on control power to the GridMaster
controller by toggling the ON switch on the back
of the control to the On position. The power
indicator will illuminate.
STEP 4. Test the connection by opening a browser
window and connecting to the network to which
the controller is connected. Connect to the
controller by entering in the address and log-in
credentials securely supplied to you by S&C
Electric Company. Detailed log-in and password
maintenance information can be found in S&C
Instruction Sheet 1025-530.

S&C Instruction Sheet 1025-511 11
General Specifications
Control Voltage 24 Vdc
Operating Temperature -20°C to 50°C (-4°F to 122°F)
Operating Humidity 95% non-condensing humidity
Altitude 3000 meters (9843 feet)
Module Pinouts
Terminal 1 and Terminal 2
Pin Function
1Data (TX +)
2Data (TX -)
3Data (RX +)
4Ground (-)
5Ground (-)
6Data (RX -)
7Power (+)
8Power (+)
Ethernet
24 Vdc
Appendix