Sercel GRC ESP-Series User Manual

Doc No. 006-0211-00 Rev AD Page 23 of 62
INSTALLING THE SURGE SUPPRESSOR (PROTECTOR) AND
SURFACE CHOKE
The ESP gauge surface readout equipment such as the Scout-3000 connects to the
downhole tool via the motor power cable through the Surge Suppressor and Surface
Choke. Communication and power are provided via a “Comms-On” technique; meaning
the communication and power are both transmitted through the motor cable. The
surface readout equipment provides “Comms-On” power to the ESP gauge and is
connected to the ESP Surge Protection Equipment via the gauge signal and wellhead
ground.
Surface Choke
The surface choke, shown in Figures 18a/b, is connected between the VSD 3-phase
power and the Surge Panel or Surge Protector. The purpose of the surface choke is to
allow the ESP Gauge Interface to provide power to and communicate with the downhole
tool. The ESP Gauge Interface provides between 30-80VDC to the Neutral wire on the
Surface Choke to power the downhole gauge. The Surface Choke is designed to block
AC voltages from entering the ESP Surface Equipment as well as creating a virtual
ground via WYE point for direct connection for Downhole communication.
Figure 18a. Surface Choke Photo. Part Number #99B990.
Neutral or WYE
Three Phase
Motor Power
Connection

Sercel GRC ESP-Series Specifications

General

Brand	Sercel
Model	GRC ESP-Series
Category	Measuring Instruments
Language	English