Description

The OP1460 allows users to safely interface various equipment to the PHIL microgrid node.

It features:

One micro-grid interface (three-phase and neutral) on the rear panel to connect to the OP8110 amplifiers that emulates the micro-grid
Three DER interfaces (three-phase and neutral) on the rear panel to interface OP8110 amplifiers that emulate a distributed energy resource (DER) to the PHIL microgrid
Three DER interfaces (three-phase and neutral) on the front panel to interface external equipment to the PHIL micro-grid
Locally (Start/Stop button) or remotely (through a digital output of a simulator) controllable contactors to dynamically connect or disconnect the DER to the PHIL microgrid
Three disconnect switches (padlock compatible) to isolate the external equipment from the PHIL microgrid
Embedded measurement devices to interface with the OP1470 (to provide real-time visual power measurements)
All lines are protected with 25A fuses and fuses are replaceable (located on rear panel)

The three DER interfaces are shared. They can either be set to external mode (meaning that the connections on the front panel will be used) or internal mode (meaning that the connections on the rear panel will be used). They are individually controllable (ie: DER 1 can be internal while DER 2 and DER 3 are external).

Functional Overview

Electrical Schematic

The neutral connections of the internal interfaces (DER and uGRID) are solidly grounded in order to ensure that the isolation ratings of the test bench equipment are met. This also grounds the external neutral connections through the fuse holders once contactors and switches are in closed position.

Front panel	Rear panel

Controls and Indicators

DER Disconnect Switches

Use these switches to effectively disconnect (and isolate) the external connections of a DER channel from the microgrid busbar node. The disconnect switches can be secured with a padlock if additional safety is desired.

The disconnect switches should not be used to interrupt current. The user should start by opening the circuit using the contactors and then open the disconnect switch.

24V ON LED

This LED indicates that the OP1460 is correctly supplied. When the 24V supply is absent, the LED will be OFF and all DER contactors will be forced in open position.

DER Control Selector Switch

This switch allows selecting which control mode is used to command the DER contactors.

Switch position	Impact
Local	Contactors are controlled via the front Start/Stop buttons.
Remote	Contactors are controlled via three digital outputs (one per DER channel) of the simulator (logic low to open contactors, logic high to close).

DER Start/Stop Buttons

These buttons allow to control the contactors of the associated DER channel when in local mode. An indicator light located between the Start and Stop buttons lights up when the contactors associated with the DER channel are closed. The indicator light works in both Local and Remote modes.

Internal/External Selector Switch

These switches (one per DER channel) allow switching between external (front panel) inputs and internal (inside cabinet) inputs. They are located on the rear panel of the OP1460.

Switch position	Selected input mode
1 (FRONT)	External (front panel)
2 (REAR)	Internal (inside cabinet, rear panel)

Fuse Holders

Fuses can be replaced by opening the fuse holders. Note that opening the fuse holder effectively opens the circuit. Also, the neutrals are not fused, they are jumped inside the fuse holders.

Digital input DB37 connectors

These DB37 female connectors are provided to interface with the digital outputs of an OP5360-2 module inside a simulator. The digital inputs on C1 allow to switch ON (logical '1') or OFF (logical '0') the DER contactors when the DER Control Selector Switch is in "Remote" position. The following table lists the pin assignement of this connector:

C1 Connector
DB37F	Pin assignment	DB37F	Pin assignment
1	DER 1 Command	20	DER 1 Return
2	DER 2 Command	21	DER 2 Return
3	DER 3 Command	22	DER 3 Return
(all other pins are unused / reserved for future use)
18	24V (supplied by OP1460)	37	GND

Connector C2 can be used to access the unused digital outputs of the OP5360-2 by daisy chaining another equipment to the OP1460. Please contact your OPAL-RT representative if you require further information on this feature.

Specifications

Specification	Value
Maximum steady state current per line	15 Arms
Maximum voltage (line to chassis)*	600Vac / 600Vdc

Note: Neutral lines are grounded, see electrical schematic.

Specialized Solutions Documentation

OP1460 Microgrid Interface with Busbar