NexBlue 1-Phase Current Sensor | CS3ANAUK1P | WiFi & Nexus RF

Description

The NexBlue Zen Single Phase Current Sensor is a compact DIN rail energy monitoring device designed to support dynamic load balancing (DLB) and solar surplus EV charging. By measuring household consumption in real time, it helps compatible NexBlue EV chargers adjust charging power automatically, reducing the risk of overload while making better use of available solar generation.

Ideal for properties without a smart meter, the Zen communicates locally using Nexus RF, WiFi, Bluetooth or Ethernet. Its low profile housing, integrated terminals and included CT clamps make it a practical choice for installers specifying reliable EV charging infrastructure.

Single Phase

Monitoring configuration

0-80 A

CT clamp measurement

85-264 V

AC power supply

DIN Rail

Indoor mounting

IP30

Ingress protection

3 Years

Manufacturer warranty

Safety and installation: This device must be installed by a competent person in accordance with BS 7671 and the manufacturer’s installation manual. It is intended for indoor use only and should be mounted on a suitable DIN rail within an appropriate enclosure.

Compatibility and model data: The listing reference identifies the UK single phase variant as CS3ANAUK1P, while NexBlue’s published product data uses the base model reference CS3ANA. Confirm the exact label on the supplied unit before ordering accessories or replacement parts.

Useful information: The Zen supports TT, IT and TN installation systems and includes CT clamps for current measurement. An optional Rogowski coil can extend monitoring capability where a higher current application requires it.

Key Features

Dynamic Load Balancing

Helps prevent household overload by allowing compatible NexBlue EV chargers to respond to real time consumption and adjust charging accordingly.

Solar Surplus Charging

Supports smarter use of PV generation by helping the charging system identify available surplus energy.

Multiple Connectivity Options

Communicates using Nexus RF, 2.4 GHz WiFi, Bluetooth BLE 4.2, Ethernet and RS-485.

No External Power Adapter

Powered directly from an 85-264 V AC supply, simplifying installation and reducing additional components.

Compact DIN-Rail Design

The slim 85.8 x 27 x 66.8 mm housing is designed for straightforward DIN-rail installation in a consumer unit or enclosure.

Future Ready Energy Monitoring

Provides terminals for grid, solar, RS-485, LAN, WiFi and power supply connections, supporting integration with evolving energy systems.

Technical Specifications

General

Brand

NexBlue

Product range

Zen Current Sensor

Manufacturer model

CS3ANA

Phases

Single phase

Colour

Black

Electrical

Power supply

85-264 V AC, 50 Hz

Rated power

3 W

Voltage measurement range

85-264 V AC

CT clamp measurement range

0-80 A (included CT clamps)

Maximum CT conductor cross-section

16 mm²

Optional Rogowski coil range

0-1500 A

Installation systems

TT, IT or TN, single to three phase

Over-voltage category

OVC II

Insulation class

Class II

Connectivity

WiFi

2.4 GHz, 802.11b/g/n

Bluetooth

BLE 4.2

Nexus RF

Yes

Ethernet

ISO/IEEE 802.3u

RS-485

TIA/EIA-485A

Physical and Environmental

Dimensions

85.8 x 27 x 66.8 mm (H x W x D)

Mounting

DIN rail

Ingress protection

IP30

Operating temperature

-25°C to +55°C

Relative humidity

0-90%

Maximum altitude

2000 m

Application

Indoor use

Warranty

3 years

Frequently Asked Questions

What is the NexBlue Zen Current Sensor used for?

It monitors household energy consumption and supports dynamic load balancing and solar surplus charging with compatible NexBlue EV chargers.

Does it work without a smart meter?

Yes. The Zen is particularly useful in non smart meter scenarios, using CT clamps to provide real time consumption data for local load management.

How does it communicate with the EV charger?

It supports Nexus RF, WiFi, Bluetooth, Ethernet and RS-485, allowing flexible communication between the sensor, charger and network.

Can it be used with solar panels?

Yes. It includes a solar panel terminal and is designed to support PV surplus charging where used with a compatible NexBlue charging system.

Where should the Zen be installed?

It is designed for indoor DIN rail mounting and should be installed by a competent person in line with BS 7671 and the manufacturer’s instructions.

BTU Calculator

BTU & WATT Calculator

Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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Required Heating

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Watts

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