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Mastervolt

77031200

AC power analyzer

The Mastervolt AC Power Analyzer is an essential interface for integrating your alternative power sources (shore power, generator, inverter) into the MasterBus network. It accurately measures voltage, current, frequency, and power factor (Cos Phi) while providing a programmable dry contact and direct compatibility with Mass Sine inverters. Supplied complete with MasterBus cable, terminator, 100:5 current transformer, and user manual.

Price excl. import taxesBenefit from the professional rate

£334.69 GBP

£334.69 GBP ~~£411.91 GBP~~

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Prices exclude import taxes (indicative rate: UK import VAT 20%). DAP delivery: import taxes are paid on delivery.

Low stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

IP rating	IP65
Wired input	AC input (via current transformer), MasterBus
Wired network	Masterbus
Dimensions (W x H x D)	181 x 80 x 28 mm
Recommended battery capacity	0.0
Bulk/absorption charge voltage	0.0
Cooling method	Passive
Max efficiency	0.0
Float voltage	0.0
Maximum AC input current	0.0
Max charge current (A)	0.0
Minimum DC cable cross-section	0.0
Mounting type	Wall / Surface
Nominal voltage	0.0
Operating temperature range	-20 to +50 °C
Output voltage	0.0
Power factor (Cos Phi)	0.0
Recommended fuse rating	0.0
AC frequency monitoring	Yes
Nominal AC input voltage	120 / 230
Maximum alarm relay current	5
Apparent power monitoring	Yes
Continuous power at 25°C	0.0
Continuous output power (40°C)	0.0
Current sensor included	Yes
Current transformer primary range	1 - 250
Current transformer ratio	100:5
Current transformer secondary range	1 - 10
Dimensions (imperial)	3.1 x 7.1 x 1.1
Energy monitoring	Yes
Galvanic isolation	Oui
Generator power monitoring	Yes
Included accessories	MasterBus cable, MasterBus terminator, 100:5 current transformer, user manual
Inverter compatibility	Mass Sine
Inverter power monitoring	Yes
LED indicator details	Mode (Yellow), AC ok (Green), AC fail (Red), MasterBus (Green)
Marine-ready	Oui
MasterBus cable included	Yes
MasterBus compatible	Yes
Number of MasterBus ports	2
MasterBus power required	Yes
MasterBus terminator included	Yes
MasterBus voltage monitoring	Yes
Measured parameters	AC voltage, AC current, frequency, power, power factor
Nominal input voltage	0.0
Nominal output voltage	0.0
Operating modes	Quay, Generator, Inverter
Overload protection	Oui
Peak power	0.0
Power source	MasterBus
Product depth	28
Product height	80
Product type	AC power analyzer
Product width	181
Relay contact type	Dry contact (floating potential)
Maximum relay voltage	250
Relay output	Yes
Included RJ12 port	Yes
Shore power monitoring	Yes
Short-circuit protection	Oui
Number of status LEDs	4
Weight	0.53
Weight (Imperial)	1.2
Wired output	Programmable dry contact

Detailed description

The Mastervolt AC Power Analyzer is a multifunction measuring device designed to accurately display and monitor AC current, voltage, frequency, power factor (Cos Phi), and apparent power in your system. Essential for onboard energy management, it allows connection of AC devices such as generators or isolation transformers to the MasterBus communication network.

Comprehensive measurement and operating modes

When configured on the MasterBus network, the analyzer offers three dedicated operating modes: shore power, generator power, or converter power. Depending on the selected mode, it provides real-time data essential for monitoring. Current measurement is performed indirectly via a supplied 100:5 current transformer, ensuring optimal isolation and accuracy. Additionally, it includes a programmable potential-free contact capable of switching a relay (maximum 5A 250V) to automate certain functions of your electrical system.

MasterBus integration and Mass Sine compatibility

Powered directly by the MasterBus network, this compact (80 x 181 x 28 mm) and waterproof (IP65) module installs easily in demanding marine environments. Unlike basic interfaces, this analyzer stands out for its ability to serve as a specific MasterBus interface for Mass Sine series converters via its dedicated RJ12 port. It thus bridges traditional Mastervolt conversion equipment and modern MasterView supervision, ensuring centralized and consistent management of onboard energy.

Expert opinion

Pol CONIN

Digital Manager

« The MasterBus interface essential for AC power supervision »

The Mastervolt AC power analyser is a fundamental component for any marine electrical installation requiring fine monitoring of alternative power sources. Its real strength lies in its triple capability: precisely measuring critical parameters (voltage, current, power factor), providing a programmable relay output (5A 250V) for automation, and most importantly, integrating Mass Sine converters into the MasterBus network via its RJ12 port. Supplied with its 100:5 current transformer, it ensures secure indirect measurement. Its IP65 housing confirms its suitability for engine room environments. This is the strategic component for relaying data from a generator or shore power inlet to a MasterView display.

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AC power analyzer

£334.69 GBP

£334.69 GBP ~~£411.91 GBP~~

Frequently Asked Questions

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What is the purpose of the AC Mastervolt power analyser?

The AC power analyser is a multifunction measuring device designed to monitor your electrical installation. It allows you to view in real time the voltage, current, frequency, power factor (Cos Phi) and apparent power of your AC sources (shore power, generator or inverter).

Which data does this device measure?

Depending on the selected mode, the device measures and displays AC voltage, AC current, frequency, apparent power (VA), power factor (Cos Phi), MasterBus network voltage, and device temperature.

What are the different operating modes available?

During configuration on the MasterBus network, you can choose from three operating modes: shore power (Shore), generator power (Generator), or inverter power (Inverter).

How is current measured?

Current measurement is performed indirectly using a current transformer (current coil) with a 100:5 ratio. This component is supplied with the analyser and ensures optimal isolation and accuracy.

Is the AC power analyzer waterproof?

Yes, this module is designed to withstand demanding marine environments. It has an IP65 protection rating, making it fully protected against dust and water jets.

What are the dimensions and weight of the housing?

The analyzer is a very compact module. It measures 80 x 181 x 28 mm (height x width x depth) and weighs only 0.53 kg, making it easy to integrate into tight spaces.

What is included in the box when purchasing?

The device is delivered complete for standard installation. The box contains:

AC power analyzerMasterBus cableMasterBus terminator100:5 current transformerOperating manual

Which converters is this analyzer specifically compatible with?

This analyzer stands out for its ability to serve as a MasterBus interface specific to Mass Sine range converters from Mastervolt, thanks to its dedicated RJ12 port.

What is the purpose of the integrated potential-free contact (relay)?

The device integrates a programmable dry contact (potential-free) capable of switching a relay with a maximum capacity of 5A at 250V. This allows automating certain functions of your electrical system, such as the automatic start of a generator.

How to configure and read data from the analyzer?

Control and configuration of the analyser are entirely based on the MasterBus network. You will need a compatible display, such as the MasterView Easy panel or the MasterView System software, to view measurements and configure the device.

Which nominal voltages does the device support?

The AC power analyzer is compatible with standard electrical grids. During initial setup, you can select a nominal voltage of 120V AC or 230V AC.

What do the LED indicators on the device's front panel mean?

The device has several indicators:

Yellow LED (Mode): indicates the relay state. Green LED (AC ok): signals the presence of AC power without error. Red LED (AC fail): alerts to out-of-range voltage or frequency. Green LED (MasterBus): indicates network communication status.

Can I connect a device from another brand directly to the MasterBus network?

Never connect a non-MasterBus device directly to the MasterBus network. To enable communication between third-party equipment and the Mastervolt network, use a dedicated interface such as the Modbus interface.

How to connect the analyzer to the MasterBus network?

Connection is made very simply using standard UTP patch cables. The analyzer has two MasterBus ports to be daisy-chained with other network devices. Do not forget to install a terminator at both ends of the network.

Is it possible to create ring or T networks with MasterBus?

No, the MasterBus network must be installed in a linear daisy chain. Creating ring networks (loops) or T-connections is strictly discouraged as it may disrupt data communication.

Does the current transformer (CT) need to be purchased separately?

No, the current transformer with a 100:5 ratio is included with the AC power analyzer. You do not need to purchase it separately to take current measurements.

What happens if voltage or frequency fall outside the tolerated ranges?

If voltage, current or frequency values exceed the configured limits, the red "AC fail" LED lights up continuously and an alarm can be triggered on your MasterBus display to alert you of the issue.

Can this analyzer be used to trigger actions on other devices?

Yes, via the MasterBus network's event system, you can configure the analyzer to trigger an action on another connected device. For example, it can command a generator to start if shore power becomes insufficient.

What type of cable is used to connect the analyzer to the Mass Sine converter?

To connect the AC power analyzer to a Mass Sine inverter, you must use the dedicated communication port on the analyzer and connect it using a cable equipped with an RJ12 connector.