CG Emotron VSR Series Solar Pump Drives: Complete Guide to Features, Specifications & Programming

⚡ The VSR series from CG Emotron (CG Drives & Automation) is a dedicated solar pumping drive built for dependable, economical, user-friendly performance on borewell, irrigation and water-supply pumps. A soft-start feature prevents water hammering and extends system life, while a self-adaptive, high-accuracy built-in MPPT algorithm dynamically tracks the solar array’s maximum power point for the best possible water flow output. VSR drives accept both DC solar-array input and AC grid/generator input, so a pump keeps running even when the sun doesn’t cooperate. This guide covers everything from decoding the model number to wiring the drive and getting it running from the keypad.

💡 Main Features

✅ Supports over-current, over-voltage, phase loss, short-circuit and over-temperature protection
✅ Self-adaptive, high-accuracy MPPT (Maximum Power Point Tracking) algorithm, enhancing daily water delivery and productivity
✅ Solar power tracking efficiency of up to 99%
✅ Specialised features for water pumping applications, including tank-level control
✅ Operates seamlessly on both DC solar-panel and AC grid power sources
✅ Built-in dry-run protection, safeguarding the pump from damage and reducing maintenance costs and downtime
✅ Automatically enters dormancy mode and wakes again according to sunlight intensity
✅ Compatible with any remote monitoring system via Modbus RTU protocol
✅ Capable of driving both induction motors and permanent-magnet synchronous motors

📋 Understanding the VSR Model Number

Every VSR drive’s nameplate encodes its specification in the model number. Here’s how VSR48-003-20CEB breaks down:

Code Position	Meaning
VSR	Product series — VSR = Solar drive
48 / 23 / 11	Input AC voltage level — 48 = 380–480V AC/540V DC · 23 = 220–240V AC/310V DC · 11 = 110–130V AC/160V DC
003 … 210	Rated current code (A) — from 003 (2.5A) up to 210 (210A)
20	Protection class — IP20
C	Control panel — C = Standard panel
N / E	EMC filter — N = No filter, E = EMC filter fitted
B / –	Brake chopper — B = Brake chopper fitted, – = without

💡 A ‘-XS’ suffix on the model number denotes a drive with a 7-segment LCD display. The VSR line also includes an economical VSRE48 sub-series and a 310V-DC-input VSR23-XXX-D variant — both covered in the ratings table below.

⚖️ Available Models & Ratings

Model No.	Recommended Solar Array (kWp)	Max. Input DC Current (A)	Output Current (A)	Motor (kW / HP)
VSR48 series (380–480V AC / 540V DC)
VSR48-003-20CEB	1.1	4.5	2.5	0.75 kW / 1 HP
VSR48-004-20CEB	2.25	7.5	4.2	1.5 kW / 2 HP
VSR48-006-20CEB	3.3	10	5.5	2.2 kW / 3 HP
VSR48-009-20CEB	6	18	9.5	3.7–4 kW / 5 HP
VSR48-013-20CEB	8.25	20	13	5.5 kW / 7.5 HP
VSR48-017-20CEB	11	30	17	7.5 kW / 10 HP
VSR48-024-20CEB	16.5	31.7	25	11 kW / 15 HP
VSR48-032-20CEB	22.5	42.2	32	15 kW / 20 HP
VSR48-038-20CEB	27.5	52.8	37	18.5 kW / 25 HP
VSR48-045-20CEB	33	63.4	45	22 kW / 30 HP
VSR48-060-20CEB	45	95.0	60	30 kW / 40 HP
VSR48-075-20CEB	55.5	116.2	75	37 kW / 50 HP
VSR48-091-20CE–	67.5	137.3	91	45 kW / 60 HP
VSR48-112-20CE–	82.5	169.0	112	55 kW / 70 HP
Larger ratings available on request
VSRE48 series — economical, 380–480V AC
VSRE48-003-20CEB	1.1	4.5	2.5	0.75 kW / 1 HP
VSRE48-004-20CEB	2.25	7.5	4.2	1.5 kW / 2 HP
VSRE48-006-20CEB	3.3	10	5.5	2.2 kW / 3 HP
VSRE48-009-20CEB	6	18	9.5	3.7–4 kW / 5 HP
VSR23 series — single-phase 220–240V AC
VSR23-2p5-20CEB	0.6	4.5	2.5	0.37–0.4 kW / 0.5 HP
VSR23-4p2-20CEB	1.1	7.5	4.2	0.75 kW / 1 HP
VSR23-7p5-20CEB	2.25	10	7.5	1.5 kW / 2 HP
VSR23-9p5-20CEB	3.3	18	9.5	2.2 kW / 3 HP
VSR23-XXX-D series — economical, 310V DC input only
VSR23-9p5-D	3.3	18	9.5	2.2 kW / 3 HP
VSR11 series — single-phase 110–130V AC
VSR11-9p5-20CEB	1.6	18	9.5	1.1 kW / 1.5 HP

💡 VSR48-091 and VSR48-112 ship without a brake chopper (catalog code ends “20CN–” for these two ratings) — the EMC-filter digit is still corrected to E here. VSR23-9p5-D is an economical, DC-input-only version of the VSR23-9p5 for pure solar (no AC grid backup) installations.

🔧 General Specifications

Parameter	VSR48 / VSRE48	VSR23	VSR23-XXX-D	VSR11
Maximum PV input DC voltage	800V DC	450V DC	450V DC	450V DC
Recommended Voc range	500–700V DC	320–370V DC	360–430V DC	150–430V DC
Recommended MPPT voltage range	450–600V DC	250–350V DC	250–350V DC	130–350V DC
Starting voltage range	230–800V DC	60–450V DC	60–450V DC	60–450V DC
Grid / backup generator input	3-phase 415V (−20%~+20%)	Single-phase 220V (−20%~+20%)	— (solar only)	Single-phase 110V (−15%~+20%)
Rated output voltage	3-Ph 415V	3-Ph 220V	3-Ph 220V	3-Ph 110V
Output frequency	0–600Hz (default 0–50Hz) across all series
Control modes	V/f control · Sensor-less vector control 1 & 2
Speed range	1:50 (V/f) · 1:100 (SVC1) · 1:200 (SVC2)
Speed accuracy	±0.5% (V/f) · ±0.2% (SVC1 & 2)
Torque response	< 10ms (SVC1 & 2)
Overload capability	150% for 60s · 180% for 10s · 200% for 1s
Built-in protection	Lightning protection, over-current, over-voltage, output phase loss, under-load, under-voltage, short-circuit, overheating, water-pump dry run
Ambient temperature	−10°C ~ 50°C
Altitude	0–2000m (derate 1% per 100m above 1000m)
Relative humidity	5%–95%, no condensation
Efficiency	≥ 93% at rated power
Installation / Cooling	Wall or rail mounting · forced air cooling · IP20

🔌 Wiring the VSR Drive

Every VSR drive accepts a DC solar-array input at (−)/(+), with an optional AC grid/generator input for backup pumping on cloudy days or at night (except the DC-only VSR23-9p5-D). Layouts scale with power: 0.75–2.2kW models have a leaner I/O set (4 digital inputs, 2 analog inputs, 1 open-collector output), while 4–55kW VSR48 models add two more digital inputs, a second relay/open-collector output, and a third (bipolar) analog input.

Main power & motor circuit

✅ (−), (+) — DC input from the solar array
✅ L1, L2, L3 (VSR48) / L, N (VSR23, VSR11) — AC grid or backup-generator input, through an MCCB
✅ PB — external braking resistor connection
✅ U, V, W — output to the motor
✅ Earth (⎓) — motor and drive frame earthing

Control terminals

Terminal	Type	Function
DI1–DI4 (DI1–DI6 on 4–55kW)	Digital input	Programmable switch inputs — run/stop, direction, tank-level float switches, preset speeds, etc.
DI7/HI	Digital / pulse input	High-speed pulse input for flow/speed feedback
AI1, AI2 (+ AI3 on 4–55kW)	Analog input	DC 0–10V or 0–20mA reference — e.g. a pressure transducer for constant-pressure pumping. AI3 (4–55kW) is bipolar −10V~+10V
AO1 (+ AO2 on 4–55kW)	Analog output	0–10V output, e.g. to a remote flow/frequency meter
Y1 / Y2/HO	Digital output	Open-collector output(s), 0–24V; on 4–55kW, Y2/HO doubles as a high-speed pulse output
R1A/R1B/R1C (+ R2A/R2B/R2C on 4–55kW)	Relay output	Changeover relay contact(s), 250V AC/3A or 30V DC/1A — fault indicator, contactor or pump-start signal
485+, 485−	RS485	Modbus RTU communication — for remote monitoring/SCADA integration
+24V, +10V, GND, PE, PLC	Power/reference	Onboard supply rails for external switches and the analog reference potentiometer

⚠️ Always wire and check connections with the drive fully powered down and the DC bus capacitors discharged. Route control wiring separately from the motor power cable to avoid electrical noise affecting the analog signals.

☀️ Recommended Solar Array Configuration

The number of panels needed per string depends on each panel’s open-circuit voltage (Voc). As a guide, for a 550W panel (Voc ≈ 50V):

Model	Configuration (panels per string × strings)
VSR23-2p5 / 4p2 / 7p5 / 9p5	8 × 1
VSR48-003 / 004 / 006 / 009	13 × 1
VSR48-013	13 × 1
VSR48-017	13 × 2
VSR48-024	14 × 2
VSR48-032	13 × 3
VSR48-038	14 × 3
VSR48-045	13 × 4
VSR48-060	15 × 5
VSR48-075	15 × 6
VSR48-091	14 × 8
VSR48-112	14 × 9

💡 Configurations shift with a different panel Voc/wattage — CG’s technical team can help size the array for other panel specifications or for grid-sharing setups.

🔧 Accessories

Accessory	Part No.	Description	Connection
Keypad – standard	S-PPU-VS	LCD display	RJ45
Keypad – graphic	G-PPU-VS	Graphical display	RJ45
Relay card*	VSOPT-RL	Multi-pump relay card	Terminal connection
Profibus card	VSPROFIBUS-DP	Profibus communication card	DB9
Profinet card*	VSPROFINET-2P	2-port Profinet communication card	RJ45

*Available from ≥ 4.0kW rating.

💻 Programming & Commissioning the VSR Drive

💡 Typical first-run sequence: wire the solar array to (−)/(+) and, if fitted, the AC grid input to L1/L2/L3 (or L/N) → power up and confirm the keypad display → enter the parameter menu and set the motor nameplate data (rated voltage, current, frequency, poles) → configure the MPPT/DC-input parameters for your array’s Voc and wattage → set up any tank-level or dry-run protection inputs on the DI terminals → press RUN to confirm motor rotation direction, then let the MPPT algorithm take over as sunlight varies through the day.

Using EmoWizard software

EmoWizard helps with easy commissioning and troubleshooting of VSR series drives, offering user-friendly tools for viewing, manipulating and exchanging data with the drive. Statistics data can be plotted using the built-in oscilloscope, and the drive can be started/stopped directly from the software’s control panel.

🌍 Typical Applications

✅ Agriculture irrigation
✅ Industrial water supply
✅ Domestic water
✅ Animal husbandry
✅ Desert control
✅ Aquaculture

❓ Frequently Asked Questions

Can a VSR drive run a pump when there’s no sunlight?

✅ Yes — every VSR model except the DC-only VSR23-9p5-D accepts an AC grid or backup-generator input, so the pump can keep running from mains power when solar generation drops.

What is MPPT and why does it matter for solar pumping?

✅ Maximum Power Point Tracking continuously adjusts the drive’s operating point to extract the most power available from the solar array at any given sunlight level, cloud cover or temperature. VSR’s self-adaptive MPPT algorithm reaches up to 99% tracking efficiency, which directly translates into more water pumped per day.

Does the VSR drive protect the pump if the water source runs dry?

✅ Yes — built-in dry-run protection detects a loss of load/flow and stops the drive automatically, preventing pump damage and reducing maintenance costs.

Can the VSR drive be monitored remotely?

✅ Yes — the built-in RS485 port supports Modbus RTU, so the drive can be integrated with any compatible remote monitoring or SCADA system for irrigation or water-supply networks.

🛒 Shop the CG Emotron VSR Series

🚀 These VSR models are currently in stock and ready to ship:

✅ VSR48-009-20CEB — 3.7–4kW / 5HP
✅ VSR48-013-20CEB — 5.5kW / 7.5HP
✅ VSR48-017-20CEB — 7.5kW / 10HP
✅ VSR48-024-20CEB — 11kW / 15HP
✅ VSR48-032-20CEB — 15kW / 20HP
✅ VSR48-038-20CEB — 18.5kW / 25HP
✅ VSR48-045-20CEB — 22kW / 30HP
✅ VSR48-060-20CEB — 30kW / 40HP
✅ VSR48-075-20CEB — 37kW / 50HP
✅ VSR48-091-20CE– — 45kW / 60HP
✅ VSR48-112-20CE– — 55kW / 70HP
✅ VSRE48-009 — 3.7–4kW / 5HP (economical series)
✅ VSR23-9P5 — 2.2kW / 3HP (single-phase 230V input)

💡 Not yet listed in the shop: VSR48-003/004/006, VSRE48-003/004/006, VSR23-2p5/4p2/7p5, VSR23-9p5-D, and the VSR11-9p5. Get in touch for availability on these ratings.